Smartwool Men's Merino 250 Baselayer Hoodie - Size: Medium

Whether we're sneaking in a few last hikes in the late fall before snow starts falling or riding over open groomers on frigid winter days, the Smartwool Classic Thermal Merino Base Layer 1/4-Zip Top offers next-to-skin comfort and plenty of warmth so we can continue getting outside as temperatures drop. The Merino wool construction is warm and breathable, perfect for high-intensity activities in cool weather, and it's naturally odor-resistant for a fresh feeling that lasts all day.

When summer rolls around, we still rely on the power of Smartwool's merino wool for odor-fighting, temperature-regulating tech. The Classic All-Season Merino 1/4-Zip Baselayer Top is lightweight enough for high-temperature adventures, offering protection against blistering heat, trailside foliage, and our own sweat production. Merino wool's natural attributes translate into comfort on fall backpacking trips and spring backcountry tours, too, and the nylon-core construction places the techy wool next to skin for ultimate softness and reliable performance. Finish this style off with a slim fit and articulated seams for movement-mirroring mobility and an easy-to-layer silhouette, and we're sure to select this first layer no matter the season.

Whether we're gearing up for our next ascent or packing our backpack for a day-long adventure, we're sure to be wearing the Smartwool Merino 250 Baselayer Hoodie. It's naturally breathable and perfect for layering. Odor-resistant qualities keep us fresh even when we're sweating bullets, and flatlock seams add comfort while reducing chafing. This multi-purpose hoodie is what we're reaching for when we're pursuing adventure, or even when we just need something to throw on for the day.

If Wisconsin winters have taught us one thing, staying warm starts with a good base layer. Our Thermaskin Heat 3/4-zip top provides extra warmth and is super soft and comfortable. Its high-performance fabric actually helps generate heat by absorbing body moisture. It also wicks perspiration away from your skin, crucial for comfort in cold weather. It's long enough to tuck into pants or jeans, ensuring your cozy stays secure all day.

Whether you're getting out for a winter hike, running errands or even feel a chill at home, some days you just need a base layer. It's made with innovative fabric that generates heat by absorbing body moisture. This crewneck gives you an extra layer of warmth that's made to move with you, thanks to the thicker, buttery soft jersey fabric and just-right stretch. Plus, it's lightweight and bulk-free for a smooth and easy feel under your clothes. And with a moisture-wicking fabric finish, you'll stay warm AND dry.

Wonderfully warm with the perfect amount of stretch, this base layer crew features a naturally flexible feel that makes it virtually disappear. Designed to pull moisture away from your skin, it'll keep you dry from the slopes to the shops, too. Complete the set by pairing with our Thermaskin pants!

Crafted in soft, breathable cotton, this set of short sleeve undershirts from Columbia is perfect for layering. | Columbia Men's Short Sleeve Solid V-Neck Undershirts - 3 Pack, Medium

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The performance fabric is innately breathable, so it's perfect for tackling your to-do list without overheating. Its moisture-wicking and temperature-regulating powers keep you cool and carefree, whether you're working out in the yard or working out in the gym.

The performance fabric is innately breathable, so it's perfect for tackling your to-do list without overheating. Its moisture-wicking and temperature-regulating powers keep you cool and carefree, whether you're working out in the yard or working out in the gym.

The performance fabric is innately breathable, so it's perfect for tackling your to-do list without overheating. Its moisture-wicking and temperature-regulating powers keep you cool and carefree, whether you're working out in the yard or working out in the gym.

Kids love to bundle up in this thermal undershirt, complete with flat-locked construction for a smooth fit. The stretchy, super-soft jersey generates warmth to keep kids nice and toasty, while moisture-wicking ensures they don't overheat -- the perfect happy medium.

Kids love to bundle up in this thermal undershirt, complete with flat-locked construction for a smooth fit. The stretchy, super-soft jersey generates warmth to keep kids nice and toasty, while moisture-wicking ensures they don't overheat -- the perfect happy medium.

Kids love to bundle up in this thermal undershirt, complete with flat-locked construction for a smooth fit. The stretchy, super-soft jersey generates warmth to keep kids nice and toasty, while moisture-wicking ensures they don't overheat -- the perfect happy medium.

Kids love to bundle up in this thermal undershirt, complete with flat-locked construction for a smooth fit. The stretchy, super-soft jersey generates warmth to keep kids nice and toasty, while moisture-wicking ensures they don't overheat -- the perfect happy medium.

If Wisconsin winters have taught us one thing, it's that staying warm starts with a good base layer. Our Thermaskin Heat Turtleneck base layer not only provides an extra bit of warmth, but it's also designed to be super soft and comfortable, ensuring you feel cozy all day. Its high-performance fabric actually helps generate heat by absorbing body moisture. It also wicks perspiration away from your skin, which is crucial for comfort in cold weather. It's long enough to tuck into pants or jeans, ensuring your cozy stays secure all day.