Made with a textured knit with peached finish for first-layer warmth, the Saxx Roast Master Midweight base layer bottoms keep you warm whether you're carving turns or dodging snowballs.

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With beautifully detailed patterning and a soft merino wool fabrication, Kari Traa Rose base layer bottoms go beyond basic and are perfect for cold-weather activities.

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Crafted with high-output activities and travel in mind, the men's Patagonia Sender boxer briefs offer the moisture-wicking power and cool feel of recycled nylon blended with stretch micromesh.

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Whether under your hiking kit or just under jeans around town, the women's REI Co-op Silk bottoms make a great foundation as temps start dropping.

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The REI Silk long underwear bottoms are smooth, soft and incredibly comfortable. They'll help keep you warm on a cold day and they work great under additional layers.

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The REI Silk long underwear bottoms for women are smooth, soft and incredibly comfortable. They'll help keep you warm on a cold day and they work great under additional layers.

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Soft, cozy and naturally moisture-wicking, the Icebreaker Siren bikini underwear offer itch-free merino wool fabric in a modern, sleek fit.

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Super comfortable and naturally odor-resistant underwear bottoms for everyday wear, the Icebreaker Siren Hipkini briefs rightly deserve a place in your top drawer.

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Cozy, breathable and soft, the Icebreaker Siren thong underwear offer moisture-wicking, itch-free merino wool fabric in a modern fit.

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These lightweight, itch-free merino wool boy shorts are perfect for daily wear or kicking back after a long day outside. The Icebreaker Sprite Hot Pants also have offset seams for all-day comfort.

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With low-profile seams to minimize bulk and maximize comfort, the women's The North Face Summit Pro 120 tights are an adventure-ready, lightweight base layer made for any cold-weather exploration.

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For all-day, everyday comfort and performance, Saxx Vibe boxer briefs are made from soft, moisture-wicking jersey fabric with a slim, supportive fit for smooth, against-the-skin contact.

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When the air is crisp and the frost might bite, but Mother Nature continues to call, Saxx Viewfinder base layer tights let you get outdoors and stay toasty in supersoft, midweight coziness.

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Equipped with an evolved version of the BallPark Pouch™, which has been updated to improve fit and function, the Saxx Volt boxer briefs support you throughout a range of sport and fitness activities.

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