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Bundles - Baselayer Collection (L2)

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Built from the same moisture-wicking fabric as the Core Lightweight Hoody, our Core Lightweight Crew LS makes for a solid base layer.

Built from the same moisture-wicking fabric as the Core Lightweight Hoody, our Core Lightweight Crew LS makes for a solid base layer. Whether used as a standalone piece during hot weather or layered into your system, the Core Lightweight Crew will perform across all seasons regardless of the pursuit.

Core Lightweight Crew LS

With a gusseted no-bunch crotch and low-profile elastic waistband, the CORE Lightweight Bottom provides just enough warmth for when temps dip and dial up animal activity.

With a gusseted no-bunch crotch and low-profile elastic waistband, the CORE Lightweight Bottom provides just enough warmth for when temps dip and dial up animal activity. Featuring permanent Polygiene® Odor Control technology to neutralize odor by stopping the growth of odor-causing bacteria and fungi. The CORE Lightweight Series is the next-to-skin layering foundation for SITKA Systems, actively moving moisture away from the skin while keeping the hunter dry and comfortable.

Core Lightweight Bottom

Designed to be more than just another base layer, the Core Lightweight Hoodie is the foundation that all our SITKA systems are built from.

Designed to be more than just another base layer, the Core Lightweight Hoodie is the foundation that all our SITKA systems are built from. High-performance polyester construction moves moisture through periods of high aerobic activity while drying quickly during low periods spent sitting, glassing or calling.

Core Lightweight Hoodie

With short sleeves and a low-profile crewneck, the CORE Lightweight Crew SS is the next-to-skin layering foundation for all seasons.

With short sleeves and a low-profile crewneck, the CORE Lightweight Crew SS is the next-to-skin layering foundation for all seasons. Featuring permanent Polygiene® Odor Control Technology to neutralize odor by stopping the growth of bacteria and fungi. The CORE Lightweight Series works hard to keep odor at bay while actively moving moisture away from the skin.

Core Lightweight Crew SS

When the fall chill starts to settle in, it’s time to reach for the Core Merino 220 Half-Zip.

When the fall chill starts to settle in, it’s time to reach for the Core Merino 220 Half-Zip. Featuring a midweight, double-layer merino wool blend, it regulates temperature to keep you comfortable from mild early-fall afternoons through late-season cold snaps. Merino wool is also naturally odor-resistant to help maintain stealth, and our ArmorSpun merino wool is reinforced with nylon to make sure it stands the test of time.

Core Merino 220 Half-Zip

Layer the midweight Core Merino 220 Bottom when the fall frost arrives.

Layer the midweight Core Merino 220 Bottom when the fall frost arrives. Merino wool has a high warmth-to-weight ratio to keep you warm without a ton of bulk, and it regulates temperature well so you don’t overheat. Merino wool is also naturally odor-resistant to help you stay undetected, and our ArmorSpun merino wool is reinforced with nylon to make it last.

Core Merino 220 Bottom

Layer the Core Merino 120 Bottom under your pants for superior odor suppression and comfort on warm-weather hunts.

Layer the Core Merino 120 Bottom under your pants for superior odor suppression and comfort on warm-weather hunts. The ultralight merino wool blend naturally resists odor to help you stay undetected and regulates temperature through changing conditions and activity levels. It’s also reinforced with ArmorSpun merino wool so it’s durable enough to last for seasons to come.

Core Merino 120 Bottom

Heading into the backcountry late in the season calls for the heavyweight warmth of the Core Merino 330 Zip-Off Bottom.

Heading into the backcountry late in the season calls for the heavyweight warmth of the Core Merino 330 Zip-Off Bottom. Our heaviest-weight merino wool blend keeps you warm on the coldest hunts of the year and regulates temperature to maintain comfort when you’re on the move. Merino wool is also naturally odor-resistant to minimize smell on extended trips, and our ArmorSpun merino wool is reinforced for superior durability. We then added a recycled synthetic lining quickly moves sweat away from your skin to keep you dry and warm. And when you need to shed a layer, side zips let you remove this bottom without taking your boots off, making this baselayer ideal for long expeditions and shifting weather conditions.

Core Merino 330 Zip-Off Bottom

Truly complete your system with the Core Merino 220 Boxer.

Truly complete your system with the Core Merino 220 Boxer. Soft, midweight merino wool offers itch-free comfort you’ll want to wear whether you’re in the field or not, and it’s naturally odor-resistant to minimize smell during extended trips into the backcountry. Our ArmorSpun merino wool is also reinforced with nylon to ensure this boxer stays in your kit for a long time. Due to sanitary precautions, underwear and boxers cannot be returned.

Core Merino 220 Boxer

When the forecast is frigid, pack the heavyweight warmth of the Core Merino 330 Hoodie.

When the forecast is frigid, pack the heavyweight warmth of the Core Merino 330 Hoodie. It features our warmest-weight merino wool to keep you warm in the coldest conditions. Temperature-regulating merino wool has an exceptional warmth-to-weight ratio to keep you warmer with less bulk, and the contoured hood with a built-in facemask offers additional comfort and concealment. Merino wool also resists odor to help you stay undetected, and our ArmorSpun merino wool is reinforced for improved durability. And to make sure excess moisture doesn’t leave you wet and cold, we added a synthetic interior that quickly moves sweat off your skin and through your system to keep you dry and warm.

Core Merino 330 Hoodie

Built for frigid late-season sits, the heavyweight Core Merino 330 Half-Zip features our warmest-weight merino wool to keep you warm in the coldest conditions.

Built for frigid late-season sits, the heavyweight Core Merino 330 Half-Zip features our warmest-weight merino wool to keep you warm in the coldest conditions. Merino wool has an exceptional warmth-to-weight ratio to keep you warmer with less bulk and it regulates temperature through stop-and-go pursuits. Merino wool also resists odor to help minimize your scent, and our ArmorSpun merino wool outlasts traditional merino wool. And to prevent sweat from leaving you wet and cold, we added a synthetic interior that rapidly moves moisture away from your skin and through your system to keep you dry and warm.

Core Merino 330 Half-Zip

Count on the Core Merino 120 Hoodie to take you from warm early season conditions through active hunts in cool weather.

Count on the Core Merino 120 Hoodie to take you from warm early season conditions through active hunts in cool weather. Featuring an ultralight merino wool blend that regulates temperature to help you stay comfortable through changing conditions, and it also naturally resists odor to suppress your scent. Made with ArmorSpun merino wool to give the extra durability needed to last for seasons to come.

Core Merino 120 Hoodie

Early season pursuits call for the Core Merino 120 Long-Sleeve Crew.

Early season pursuits call for the Core Merino 120 Long-Sleeve Crew. Our lightest merino baselayer, it features an ultralight merino wool blend that regulates temperature to help you stay comfortable through changing conditions and activity levels, and it naturally resists odor to suppress your scent. Plus, ArmorSpun merino wool gives it the extra durability needed to last for seasons to come.

Core Merino 120 LS Crew

Prepare yourself for long, frozen sits with the Core Merino 330 Bottom.

Prepare yourself for long, frozen sits with the Core Merino 330 Bottom. Heavyweight merino wool brings itch-free warmth for the coldest hunts, while a recycled synthetic lining moves any moisture away from your skin to keep you dry and warm. Merino wool also brings more warmth with less bulk and is naturally odor-resistant to help you avoid being detected. Our ArmorSpun merino is also stronger than traditional merino wool to ensure it’s durable enough season after season.

Core Merino 330 Bottom

Super-light and quick-drying to deliver rapid moisture transport for all-day comfort as activity levels rise and fall.

Super-light and quick-drying to deliver rapid moisture transport for all-day comfort as activity levels rise and fall. Polygiene Odor Control technology keeps scent to a minimum.  &lt;/br&gt;  &lt;/br&gt;  &lt;i&gt;Due to sanitary precautions, underwear and boxers cannot be returned.&lt;/i&gt;

Core Lightweight Boxer

The short-sleeve version of our lightest merino baselayer features an ultralight merino wool blend that regulates temperature to help you stay comfortable.

The short-sleeve version of our lightest merino baselayer features an ultralight merino wool blend that regulates temperature to help you stay comfortable through changing conditions and activity levels, and it naturally resists odor to suppress your scent. We designed this short-sleeve crew with ArmorSpun merino wool to give it the extra durability needed to last.

Core Merino 120 SS Crew

The newly upgraded long sleeve and low-profile crewneck CORE Lightweight Crew Long Sleeve provides exceptional moisture management.

The newly upgraded long sleeve and low-profile crewneck CORE Lightweight Crew Long Sleeve provides exceptional moisture management. This minimal top keeps you concealed when worn as an outerlayer in warm temps and provides critical comfort and moisture-wicking throughout the rest of the season. The stretch thumb loops keep sleeves in place when layering under jackets. The CORE Lightweight Series is the next-to-skin foundation for high-exertion hunts and a perfect layer to regulate body temperature.

Women's Core Lightweight Crew LS

A sleek and stretchy next-to-skin solution for moderate drops in temperature. The Women's Core Lightweight Bottom is designed to keep you moving freely with highly efficient moisture wicking and breathability when activity levels peak. Featuring permanent Polygiene® Odor Control Technology that neutralizes odor.

Women’s Core Lightweight Bottom

Pack the heavyweight Women’s Core Merino 330 Hoodie when frigid temps are in the forecast.

Pack the heavyweight Women’s Core Merino 330 Hoodie when frigid temps are in the forecast. It features our heaviest-weight merino wool to keep you warm on the coldest hunts. Temperature-regulating merino wool’s exceptional warmth-to-weight ratio keeps you warmer with less bulk, and the contoured hood with a built-in facemask offers additional warmth and concealment. Merino wool also resists odor to keep smell to a minimum, and our ArmorSpun merino wool is reinforced for improved durability. And to make sure sweat doesn’t leave you wet and cold, we added a synthetic interior that quickly moves moisture away from your skin and through your system to keep you dry and warm.

Women's Core Merino 330 Hoodie

Stay warm through long, frigid sits with the Women’s Core Merino 330 Bottom.

Stay warm through long, frigid sits with the Women’s Core Merino 330 Bottom. Heavyweight merino wool brings soft, itch-free warmth for the coldest conditions, while a recycled synthetic lining moves any moisture away from your skin to keep you dry and warm. Merino wool also delivers more warmth with less weight and is naturally odor-resistant to minimize smell. Plus, our ArmorSpun merino is stronger than traditional merino wool to make sure it lasts for many seasons to come.

Women's Core Merino 330 Legging

Hot early-season hunts and highly active pursuits call for the Women’s Core Merino 120 Long-Sleeve Crew.

Hot early-season hunts and highly active pursuits call for the Women’s Core Merino 120 Long-Sleeve Crew. The lightest layer in our merino line, it features an ultralight merino wool blend that regulates temperature to help you stay comfortable through changing conditions and activity levels. It’s also naturally resists odor to help suppress your scent. Plus, ArmorSpun merino wool gives it the extra durability needed to last for seasons to come.