Merino Heavyweight Half-Zip
Merino Heavyweight Half-Zip
Merino Heavyweight Half-Zip
Merino Heavyweight Half-Zip
Merino Heavyweight Half-Zip

Merino Heavyweight Half-Zip

  • Whitetail : Elevated II
$169.00 $84.50
(43 Reviews)

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The Merino Heavyweight Half-Zip is a great solution for a foundational baselayer when the mercury drops. Built with a premium 17.5-micron Merino wool face printed with GORE™ OPTIFADE™ concealment and backed with a soft polyester interior, this half-zip delivers concealment, odor control, and core warmth for mid to late seasons pursuits up and down the flyways.

Product ID: #10074

Sizing Guide

Jacket & Tops Sizing

Size Chest Sleeve
Small 36 - 38" 33"
Medium 39 - 41" 34"
Medium Tall 39 - 41" 36"
Large 42 - 45" 35"
Large Tall 42 - 45" 37"
X-Large 46 - 49" 36"
X-Large Tall 46 - 49" 38"
2XL 50 - 53" 37"
2XL Tall 50 - 53" 39"
3XL 54 - 57" 38"

Pant Sizing (Inches)

Size Waist Reg Tall
30 30" 31"
31 31" 31"
32 32" 31" 33"
33 33" 32" 34"
34 34" 32" 34"
35 35" 32" 34"
36 36" 33" 34.5"
37 37" 33" 34.5"
38 38" 33" 34.5"
40 40" 33"
42 42" 33"
44 44" 33"

Pant Sizing

Size Waist Reg Tall
Small 28 - 30" 31"
Medium 31 - 33" 31" 33"
Large 34 - 37" 32" 34"
X-Large 38 - 41" 32" 34"
2XL 42 - 45" 32" 34"
3XL 46 - 49" 32" 34"

Dakota Pant Sizing

Size Waist Reg Tall
30 31" 31"
32 33" 31" 33"
34 35" 32" 34"
36 37" 32" 34"
38 39" 32" 34"
40 41" 32"
42 43" 32"
44 45" 32"

Glove Sizing

Size Palm Circ Length
Medium 8 - 8.5" 7.5 - 8"
Large 9 - 9.5" 8.5 - 9"
X-Large 9.5 - 10" 9 - 9.5"
2XL 10 - 10.5" 9.5 - 10"

Gaiter Sizing

Size Calf Circ Boot Size
M/L 17.5" US 6-10"
L/XL 18.5" US 10-14"

How to Take
Your Measurements


    Bend your elbow and put your hand on your hip. Measure from the center of the back of your neck, along the shoulder and down the elbow to the wrist bone.


    Take measurement under armpits, around fullest part of chest and shoulder blades.


    Measure around where you normally wear your pants, keeping the tape measure a bit loose or putting one finger between your body and the tape measure.

  • 4. INSEAM

    In a standing position,measure from your crotch to where you want your pants to end, breaking at the top of the shoe in the front and just above the heel in the back.

  • 5. GLOVES

    With hand partially closed, measure over the knuckles, around the hand, excluding the thumb.

Fit Guide

SITKA Gear engineers gear with a specific Fit and intended end use in mind. These functional designs provide the user with authentic garments for the right situation.

Fit Descriptions

We can communicate our Fit descriptions in 3 different ways. Keep in mind that each garment will allow for layering in accordance to the garments place in a system and described Fit

  • P/F
  • S/F
  • E/F

    Designed for minimal layering. Whether an early season piece or already insulated this garment fits to prevent inefficiencies in heat retention caused by dead space.


    Designed to accommodate layering for more versatility from early to late season climates.


    Designed for maximum layering in the worst conditions. Cut roomier to accommodate additional layering underneath.

Back to Shopping
  • GORE™ OPTIFADE™ Concealment Elevated II is designed for whitetail hunters in an elevated position.

  • Materials: 290-Gram 59% 17.5 Micron Merino / 6% Nylon Core-Spun Face Blend / 35% Polyester Interior for natural odor resistance and durability.

  • Imported

Odor Control
Moisture Wicking

Product Comments

43 Reviews
Write a Comment
Todd Kesner
Reviewed On 01/26/2023

The Merino Heavyweight Half-Zip is one of the most comfortable pull-overs you will ever wear. I bought a XXL to accommodate a layer or two under the heavyweight. Fits great. The zipper up the front can be opened to release heat build-up as you hike up mountains. It works well as an outer layer on cool days and under a coat on cold days. No complaints so far.

Tracy Tassin
Reviewed On 01/24/2023

Love these base layers. Very comfortable, warm on the very cold days and lightweight. May be a bit pricey but money well spent. I would recommend these to all who are considering this purchase. Meets all my needs. Great gear and will add to this system in the very near future

Jeff Ables
Reviewed On 01/20/2023

Sitka has not let me down yet. Breathable comfortable and dependable. The Fanatic system is top notch for cold weather. You cannot go wrong with Sitka gear.

Reviewed On 01/18/2023

Really great wool. Soft, warm and a prefect fit both tucked and untucked. Much better length than my first lite stuff. 2xl 275lbs

Reviewed On 01/12/2023

Very comfortable, if you walk a bit to your stand you don't sweat in these high quality I like it, also keep me warm for long sit in stand!

Reviewed On 12/24/2022

Excellent base layer! I used this as my base layer with a KUIU mid layer and a duck oven jacket in mid 20 degree weather in Nebraska and stayed warm all day. Size Med was a perfect fit for me: 6 ft 175lbs.

Andy Dively
Reviewed On 12/24/2022

Adding this under a Gradient Sweatshirt anytime it gets below freezing works perfectly for me. Even while setting decoys or chasing a cripple I don't get overheated. You need to trust your layering system and Sitka has it figured out.

Reviewed On 12/20/2022

Just what I was looking for! I wanted a warm base layer to wear when the temps dip into the 40’s and below, and this fits my needs perfectly. Light, comfortable, and sneaky warm. I used this and my Fanatic jacket in 22° weather, and was warm and comfortable all morning. That afternoon, the temps got into the low 40’s so I used this under a hoodie and my downpour jacket. By the time it got dark, the temperature had fallen into the mid 30’s but I was still comfortable all evening. It is a little big in the shoulders, but not enough to be concerned about. It is a little longer in the waist, but that is perfect for tucking it in so as to keep your body heat in. I can see this easily being one of my must have pieces for many years to come!

Reviewed On 12/11/2022

Excellent layer, warm, light, dry fast, very comfortable, highly recommended.

Mitch Jeffers
Reviewed On 12/11/2022

Super warm

Caleb Strassner
Reviewed On 12/11/2022

YESSS!!!!! Absolutely can’t say enough good about this product ! Fits as expected, the quality is outstanding! I honestly don’t know how I survived with long Johns for so long. Learned my lesson last winter in Tennessee with the cheap stuff, this was worth every penny!

Dusty Hopper
Reviewed On 12/07/2022

Awesome piece of gear. Warm and comfy. Doesn’t let me sweat too bad on the walk in, and keeps me toasty once I’m in the tree. I hunt northern Michigan, with temps generally in the 20s to mid 30s. Probably my favorite piece of gear. I wish all my cloths were this enjoyable to wear. Well done Sitka.

Grant W
Reviewed On 11/22/2022

This piece is exactly what I wanted to complete the late season hunts. Not bulky, not too warm, and definitely not enough to stay warm.

Reviewed On 11/18/2022

I love this piece, it fits great and other layers just slide right over it. I can wear it alone in teal season, but it is my favorite base layer in the colder months. Would definitely recommend this piece to anyone looking for a base layer.

Reviewed On 11/17/2022

Worth the investment. I spent the past 13 years freezing and being uncomfortable. Completed a recent rifle hunt in western SD. 4 degrees without the wind and down to -11 with the wind. Didn’t realize how cold it was until I noticed my mustache was a solid block of ice. I was both sitting for long periods and actively hiking. You will not be disappointed. The quarter zip to vent heat while packing a deer out is useful. Layer up and hunt on.

Justin w
Reviewed On 11/16/2022

I think the product is designed very well and very comfortable. I did expect it to be a little warmer, but overall a good product.

Walker Bruns
Reviewed On 11/15/2022

It’s a great base layer with comfort and warmth at the fore front. It isn’t itchy and ultra compressed like other brands and allows you to use it as a true base or on top of a t shirt or long sleeve. This top has worked well for waterfowl hunting as well as deer hunting and is going to be put to the test ice fishing this winter. If you’re on the fence go for it.
Located in North Dakota

Alexander Strueder
Reviewed On 11/12/2022

Great quality product that fits true to size. Not the warmest layer by itself but paired with other lays it’s a great addition.

Bill M
Reviewed On 11/11/2022

Super nice baselayer! Very warm and comfortable. Not itchy whatsoever, especially for being a next to skin layer wool garment. I would recommend this to anyone.

Bayron Salazar
Reviewed On 11/09/2022

Great piece of gear!!! Comfortable, warm and fits great!

Reviewed On 10/28/2022

Great choice for cold mornings, thin shirt that fits amazingly and keeps you warm. Great all around choice for layering!

Michael Ott
Reviewed On 10/24/2022

Excellent warmth to weight ratio. Fits snug but not tight for size.

Chad P.
Reviewed On 10/23/2022

Great versatility & breathable. Can’t go wrong with Sitka.

Reviewed On 10/22/2022

Fits great, feels great. I feel like I blend in with the shadows. I know it's intended for ducks but I use it for deer because I wanted something for the shadows and honestly I feel like they look straight through me. It's plenty warm but doesn't get overly hot. Only downside is it doesn't have thumb holes so when I but on my jacket it doesn't quite stay in place.

Reviewed On 10/22/2022

Excellent piece. I really love merino and this one is so comfortable. Its my base layer for many days.

steve bishop
Reviewed On 02/23/2022

My favorite piece of sitka gear (and I've got a lot).

Evan Mire
Reviewed On 01/23/2022

This was my first Sitka Product for Waterfowl. I have always been cold. If it dropped down below 50°F, l looked like a marshmallow. Today it was 20°F. I had this product and my warmest banded hoodie on top of it and I was warm as can be. If you get cold easy, having this product under your current hunting system will help you cut down your layers. This is my go to base layer no matter the temperature now. Thanks Sitka!!!

Reviewed On 12/07/2021

This top is great. Warm, comfortable and versatile. I wear it very frequently either as an outer shirt, midlayer, or just lounging around the house.

Ben Yarbrough
Reviewed On 11/14/2021

I have purchased similar Merino shirts from Kuiu and First Lite in the past. I much prefer the SITKA merino to the other brands. The fabric doesn’t stretch out while you wear it and it’s perfectly comfortable against your skin.I think they should sell these in a solid color for regular use. Great product !!!!

Jason Milner
Reviewed On 08/10/2021

This on top of the Lightweight Hoody and I’m good down into the 30’s. Amazingly warm and light. Very packable. Part of my cold weather system.

Gary Kozak
Reviewed On 05/16/2021

I get cold so easy so always building up layers underneath my jacket. This piece is surprisingly light but unbelievably warm, absolutely perfect for layering. Love the feel of it I find myself wearing it around the house still after hunting. Great value.

Zach Miller
Reviewed On 02/16/2021

Supppppppper lightweight and if anyone has sweat in merino wool...IT STINKS! Not this at all! 5/5 without hesitation! I tend to wear this when I set up decoys so I don't sweat or overheat, with the moisture wicking...its prime!

Reviewed On 02/11/2021

A very warm baselayer and can also be used in mid 50s as your outer layer over a t shirt! Not your traditional itchy merino feel! Great product!

Reviewed On 01/08/2021

I’m extremely happy with this base layer! I was goose hunting today in 32 degree weather with this base layer a medium weight vest over top and an outer shell on and I was very very warm. If you’re hesitant to get this I highly recommend you get it.

Reviewed On 12/02/2020

5'9" 185lb. North Dakota

Large- Fits very well. Extremely comfortable fabric.

My go to base layer the minute it starts to get cold. Layers well with any waterfowl system products. Does not have thumb loops like the mid weight, but it has never bunched up on me layering.

Have used as my base layer from sub-zero up to the 40s. Only downside is it is slightly pricey for a what's basically a long sleeve shirt but being comfortable and warm lets you hunt more days and enjoy it. I would definitely buy it again.

Have noticed no wear or damage after heavy use.

Reviewed On 10/29/2020

High quality product. Its very comfortable and kept me warm. Was used a a base layer with a fanatic hoodie, and celsius midi on a windy weekend in the low to mid 30s. Fit was also great. I'm 165lbs 5'10" and bought a Medium.

Reviewed On 12/16/2019

Expensive? Yes. Worth it? Yes. The search for base layers that work is over for me. I cringed when I hit that order button. In doubt. Not knowing if they were going to work but they work. They’re comfortable, warm, and lightweight. Take good care of these garments hang them up when you’re done wearing them. Stay out of pickers if possible and these will last. I’ve worn them all November and December and they’ve been great.

Reviewed On 08/27/2019

Amazing product. A huge step up from 100% merino garments. I love merino and its properties, but i never really liked the feeling of it against my skin, this heavy weight piece takes care of that. This is the most comfortable next to skin piece i have worn. The only thing i did notice was that the outer merino fabric does not seems very durable so care will have to be taken when using it, but that is with any merino product.

Ross Evans
Reviewed On 12/12/2018

I have experimented with Merino Wool in the past and was never able to feel like it didn't itch.... NOT ANYMORE!!! This base layer is nothing short of amazing, I hunt a lot during the late season in MN, and WI. Temps frequently are starting at 15 to 25 degrees and falling at dark. This is the first base that didn't seem to collect the cold, never felt anything other than warmth against my skin. Also not one remote feeling of itchy. I would never know I wasn't wearing poly, but with all the benefits of Merino. Expensive is the knock others have said, not for me, it is worth every single penny!!!!!

Reviewed On 11/24/2018

Expensive.....but pay for what you get. I hate the cold. That being said I’m always looking for better gear. My last baselayer was Under Armour. I always felt clammy wearing it. This stuff is great. No clammy feeling, and keeps me very warm during Wisconsin gun deer hunting (and I live in South Carolina = hate cold). Being it’s expensive, I decided to get more use out of it.....snowboarding!!! Again, one trip out West a great... New market for Sitka gear??!

Banks Born
Reviewed On 11/04/2018

Was super excited about these base layers and I ended up getting the elevated II and the waterfowl. I was very excited about both of these pieces but I was super upset after I had them for a couple weeks, they snagged and there was little balls that formed on the arms and around the waist area. For how much I paid I was super upset with how the material upheld. I always washed it inside out and on delicate and hung dry it, I never dry my SITKA just in case. I loved the fit and material but I was just very upset with how much I paid and how the fabric didn't hold up.

Reviewed On 10/21/2018

This is absolutely top notch stuff. I’ve never found any base layer that works as well as merino, and these are the best layering ones I’ve used. They are extremely breathable but warm. I’ve used them for several consecutive days while on trips and they have zero odor and they never feel sticky. 3 guys on my last trip we’re wearing the same thing and we all had the same opinion. They’re absolutely worth the money.

Reviewed On 08/12/2018

It's really hard to beat Merino wool fabric for outdoor comfort, especially in cold or colder weather. Great moisture wicking capabilities, no stink fabric, dries quickly and best of all keeps you toasty warm. I have several SITKA Merino wool garments (and other brands) that I have worn for years and they are in extremely good condition. I have a variety of fabric weights from 150 gsm to 400 gsm. However, Merino wool does require some extra attention or they will not perform as intended. They are expensive garments so it makes sense to take care of them properly. They do not need to be washed every time you wear the Merino wool garment. When it does come time to wash, please consider the following: Wash in cold water, gentle cycle with like fabrics. Never wash with rough fabrics like jeans or fabrics with a hard hand feel. Those fabrics will greatly enhance the pilling of Merino wool. Always wash the merino garment inside out. You can use a little liquid detergent but never use fabric softener. Find a detergent that has little to no perfume type smell. Fabric softener will take away or adversely affect the moisture wicking capabilities of Merino wool. As for drying, you can use the Air Only dry cycle on a dryer for about 20 minutes then hang the shirts upside down to finish air drying. Or you can simply hang upside down for complete air drying on a hangar at room temperature. The reason for this is that if you hang the garment right side up, you will get those pinch marks from the plastic hangar on the shoulder area of the garment. Never use those thin commercial laundry metal hangars. If those pinch marks don't bother you, then hang on a plastic hangar right side up. Never dry a Merino garment in a warm or hot dryer. Sounds like a lot of extra work but it ain't. You paid a lot of money for that Merino garment. Take care of it and it will last a long, long time.

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SITKA Gear - 08.03.2018

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Barton Ramsey breeds, trains and hunts gun dogs nearly 365 days a year, but he’ll be the first to tell you, “The dogs enhance my life more often than I do anything for them.”