Kelvin Active Jacket
Kelvin Active Jacket
Kelvin Active Jacket
Kelvin Active Jacket

Kelvin Active Jacket

  • Big Game : Optifade Open Country
$289.00 $231.20
(17 Reviews)

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Soft, silent and breathable, the Kelvin Active knows no off-season. This jacket excels in the backcountry and delivers superior breathability during active pursuits. Constructed with 80g Polartec® Alpha insulation and a DWR-treated durable nylon face, this jacket is a quiet outer layer in mild conditions or as an insulating mid-layer under a shell when the temps drop.

Product ID: #30055

Men's
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"

Equinox & 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

  • 1. SLEEVE MEASURE

    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.

  • 2. CHEST SIZE

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

  • 3. WAIST SIZE

    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
  • P/F - PERFORMANCE FIT

    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.

  • S/F - STANDARD FIT

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

  • E/F - EXPEDITION FIT

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

Back to Shopping
FEATURES & SPECS
  • GORE™ OPTIFADE™ Concealment Open Country is scientifically optimized for engagement ranges of 50 yards and beyond at ground level in rocky terrain above the timber line.

  • Weight: 13.77 oz. // Size: L

  • Fabric: 20-Denier Nylon Ripstop Shell (40-Gram, 100% Nylon), Breathable Polyester Mesh Lining.

  • Insulation: 80 g/m2 Polartec® Alpha® Insulation.

  • Durable Water Repellent finish resists light precipitation and prevents the face fabric from wetting out.

  • Highly Breathable and Thermally Regulating: Polartec Alpha Active is a non-migrating lofted fleece insulation that offers superior breathability and moisture management.

  • Brushed Fleece Hand Zip Pockets and Interior Zip Chest Pocket: The zippered chest pocket secures your necessities and doubles as a stuff sack. Hand warmer pockets are lined with brushed fleece for added warmth.

  • Neck and Chin w/ Brushed Tricot Lining: The neck and chin are lined with a brushed tricot to prevent chafing and add warmth and comfort.

  • Polygiene® Odor Control Technology safely neutralizes odor caused from sweat.

Breathability
Moisture Wicking
Warmth
Durability
Fit
Product is Performance Fit, designed for minimal layering.

Technology

Polygiene
Polartec

Why We Made This

We found nothing existed between a fleece layer and loft insulation that met the demands of active cold-weather pursuits. Our solution was to create a high-performance insulating mid-layer with superior breathability for active pursuits. Constructed with a DWR-treated durable nylon face, the Kelvin Active Hoody can be worn as an outer layer in mild conditions or as a breathable, insulating mid-layer in the late season.

Product Comments

17 Reviews
Write a Comment
L Williams
Reviewed On 11/02/2020

I wanted so much more out of this jacket for the price. While the fabric is nice, it is a flimsy, shapeless piece that doesn't work well as a layering piece or as an outer layer. It's too baggy to wear under a jacket and way way way too light to consider as even a mild-weather outer piece without lots of layers underneath.

Sizing: I wear medium in just about everything I've ever purchased, and this medium is WAY too big. I am 5'4" and 130 pounds. The sleeves are 1-2" too long and the armpits are ultra baggy with extra fabric. Perhaps this is for women with very large busts. I'm average and I don't need all that material. The jacket is also on the long side for a somewhat short person. In general, the medium is just really big and baggy for the average fit hiker.

Design flaws: The pockets are completely inaccessible when wearing a pack. I literally can't get anything in or out of the pockets with my pack on, which makes me crazy. The inside pocket zips the wrong way--from bottom to top--so that when you unzip it, your cell phone slides out.

Pluses: The cuffs are nice and stay put. The pattern is quality and I like the fabric feel--seems resistant to abrasion.

Main comment: This jacket isn't an expert at anything. Its designing was imprecise and I'm not sure what they were going for or why something this lightweight would be so pricey.

Chris
Reviewed On 11/01/2020

Great product! Very warm, layer-able, and quiet! I wore this as a mid layer during the 2020 Elk season. It was perfect! Cannot recommend enough. Successful hunt thanks in part to great gear from Sitka!

FlyBum101
Reviewed On 10/15/2020

I wear this jacket to work everyday and have been extremely pleased with how the garment performs. I am a fly fishing guide based out of Central Washington and push all of my gear to the limit. This jacket works great as an outer layer over a long sleeve or over a long sleeve AND a light sweatshirt. The jacket regulates heat well, keeping me warm in a light breeze but not too warm when I am rowing. I start my day with a heavier jacket and quickly switch into my Kelvin Active Jacket as soon as I push off from the launch. I've been wearing this jacket for over a month without washing it (wow, that sounds kind of gross now that I type this out) and have no stink in the "pits." Two thumbs up for the Polygiene! I would recommend the Kelvin Active Jacket to those looking for a light puffy that they can wear on the move to provide extra insulation.

Lane Mccarty
Reviewed On 08/13/2020

This is an awesome jacket lightweight, warm, and pretty quiet. This is a jacket you will always have in your pack.

Ryan A
Reviewed On 07/23/2020

Awesome jacket! Super lightweight and packable. Best for hiking around on cold September mornings and drys fast if it catches moisture.

Bob Legasa
Reviewed On 05/22/2020

One of my favorite pieces from the Sitka Line. There's nothing more comforting than slipping this on or underneath your jacket when you've reached the top of the mountain and you've slowed down your pace. It keeps you plenty warm for those times where your sitting or have some cold winds blowing on those ridge tops. It's lightweight and compact enough that it's always in my backpack.

E Willett
Reviewed On 05/10/2020

I bought the Kelvin Active Jacket and pants for spring turkey hunting in the northeast and it has not disappointed. We were “blessed” with a spring snow this weekend with temps in the 30’s and with a simple base layer I was warm enough. The XL fits true, next time I would buy a tall for the extra sleeve length. I do wish the cuffs were Velcro or magnetic closure as I am not wild about elastic cuffs but that is me and does not take away from the quality. This is not my last Sitka purchase.

Earas
Reviewed On 10/03/2019

Fell in love with this jacket on my two-week Alaska hunt. Just such a great mid-layer piece, and wish I would have find it sooner!!! It's not overly heavy/thick, and with no hood, it is very non-obtrusive. The athletic fit is great, especially on the arms (specifically the forearms) as to not bunch up too much. Great to layer over LW Core Hoodie and under Kelvin vest or Stormfront during inclement weather for sure!

Carl Abrams
Reviewed On 10/26/2018

Love this jacket! I used the Kelvin Lite for years because most of my hunting doesn't involve bitter cold. While I had no complaints with the K Lite, the Kelvin Active improved on it. The fabric is nearly silent, it breathes well and the fit is great (the Tall version is the cat's meow for my frame). When I expect cool weather the Kelvin Active is either on my back or in my pack.

T.H
Reviewed On 09/16/2018

Awesome Jacket. super light and super warm, But doesn't overheat when you get to moving around

Joe Owens
Reviewed On 01/20/2018

Love the pattern and the design, very lightweight. But I think the sizing is a bit off. I'm 59", 170 pounds, and the medium fits so tight on my chest I can barely zip it. Also bought the mountain pants, and they are awesome.

Trevor Trehearne
Reviewed On 12/26/2017

Really lightweight but very warm nice fit. Except wish it was longer.

Eric
Reviewed On 12/24/2017

I want to start this review by saying I had very high expectations for this jacket. From what I had seen in videos and read this was supposed to be the ultimate insulation layer, keeps you warm when stationary, but breathes very well when active. Well upon receiving it the first thing I noticed was how lightweight/thin of a jacket it was this gave me my doubts. Then I had a chance to use it for a late season elk hunt in western Washington. 4 out of 4 stars! This did not disappoint at all! I put it on in the morning and never took it off. It was exactly what I was hoping for, can definitely feel the warmth when you're wearing it and is great under the Thunderhead jacket. I even wore it to sleep in for added warmth. But I never got too hot when wearing it solo or layered. Idk how they did it but it's great. The body is a little short but it was made this way so it isn't sticking out underneath other jackets when used as a layer. I'm 5'8" with athletic build and with Sitka performance fit I wear a large and this fit the same. Great jacket, I highly recommend it.

SE
Reviewed On 11/13/2017

Just a regular dude here. The hype is real...Soft, quiet, drys quickly, and is lightweight. Makes a great pillow in the sleeping bag. It's almost like a really intense base layer in the sense that it's warm, but wicks away moisture. It's bizarre; no other jacket like it and I recommend you check it out.

Jason
Reviewed On 10/17/2017

Not sure how they do it. I have the Kelvin Lite, the Kelvin Ultra Down, and the Kelvin Active. All excellent pieces and all seem to be designed for something different. I didn't think it could get any better than the Kelvin Lite. Then the Kelvin Ultra Down came out. My absolute favorite piece. Being a little skeptical of their newest piece, the Kelvin Active jacket, I put it to the test. The previous pieces are mostly design for low activity to no activity. The Kelvin Active jacket somehow keeps you warm with low activity and vents heat during high activity without sweating. No clue how they do it but this jacket is a killer at have. Warmth without overheating.

DS
Reviewed On 09/26/2017

This jacket is AWESOME! Was super excited about it when I tried it out at the Western Hunt Expo and it lived up to the hype. Wore it for two weeks while guiding wilderness hunts and it is probably my most favorite new piece of gear. Plenty warm as a stand alone outer layer even on cool mornings riding in on horse back and combined with decent rain gear, it's a perfect mid layer. Dries out quick and seems to help keep my base layer dried out as well. Going to be even better during the rifle seasons underneath my Jetstream jacket.

Jon Sica
Reviewed On 09/17/2017

This thing is awesome. You can go uphill all day, and never be too hot or too cold. Dries like a dream and makes a great pillow...what more could you ask?

1 of 5
SITKA Gear - 07.26.2017

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