Icebreaker BodyFit150 Atlas T-Shirt - Short Sleeve - Women's

Go for a trail run or a hike in your merino wool Icebreaker Women's BodyFit150 Atlas Short-Sleeve T-Shirt. The lightweight Atlas T-Shirt transports sweat away from your skin and helps regulate your body temperature.

Arc'teryx Rho LT Zip Neck Top - Women's

An Arc'teryx Women's Rho LT Zip Neck Top serves as an ideal foundation for backcountry travelers, with a tailored stretchy fit that caters specifically to the backcountry lady.

Patagonia Capilene 1 Scoop Neck Shirt - Long-Sleeve - Women's

The Patagonia Women's Capilene 1 Long-Sleeve Scoop-Neck is a silkweight base layer you'll wear all year.

Patagonia Capilene 2 Zip-Neck Shirt - Long-Sleeve - Women's

Stay cool in summer and warm in winter with the lightweight Patagonia Women's Capilene 2 Zip-Neck base layer.

Stoic Merino Crew Shirt - Long-Sleeve - Women'S

Toss all your synthetic base layers in the trash and opt for the funk-fighting, moisture-managing Stoic Merino Crew Shirt this season.

Icebreaker Nature Sweetheart Top - Long-Sleeve - Women's

With a low neckline, pigment print, and slim fit, the new Icebreaker Women's Nature Ultralite SweetHeart Long-Sleeve Top has style you rarely find in long underwear.

Patagonia Capilene 2 V-Neck Top - Long-Sleeve - Women's

Pull on the Patagonia Women's Capilene 2 V-neck base layer and meet your friends at the trailhead. Wicking Capilene fabric gives this slim-fit V-neck crazy breathability.

Icebreaker BodyFit200 Oasis Crewe - Long-Sleeve - Women's

Experience a haven of warmth and comfort in the merino wool Icebreaker Women's BodyFit200 Oasis Crewe Top.

Icebreaker BodyFit200 Chakra 1/4 Zip Top - Long-Sleeve - Women's

The Icebreaker Skin200 Chakra Zip Top for women is a versatile base layer with an athletic cut and zip-neck.

Mountain Hardwear Microchill Zip-Top - Women's

The Mountain Hardwear Women's Micro Chill Zip Tee lets you continue your morning trail runs right up until the first snow.

Mountain Hardwear Power Stretch Zip Top - Long-Sleeve - Women's

Keep your routes as versatile as the Mountain Hardwear Women’s Lightweight Power Stretch Zip Top. Quick drying and moisture wicking, this performance top helps you stay comfortable.

SmartWool Microweight Zip-T - Long-Sleeve - Women's

Mountain Hardwear Advance Lightweight Long-Sleeve Crew - Women's

Not only does the Women’s Advance Lightweight Long-Sleeve Crew use Mountain Hardwear’s Advance Lightweight synthetic fabric, but it also has channeled construction for better wicking.

Under Armour Base 1.0 Shirt -Long-Sleeve - Women's

The Under Armour Women’s Base 1.0 Long-Sleeve Crew Shirt wicks away moisture and circulates your body heat to keep you from clamming up in cold conditions.

Icebreaker BodyFit200 Oasis Crewe-Fleur - Long-Sleeve - Women's

Think the design on the sleeves of the Icebreaker Women's BodyFit200 Oasis Crewe-Fleur is just fleur-de-lis pedals? From a distance, that's what it appears to be.

Ibex Woolies Crew Top - Women's

Throw out your synthetic long johns and make the switch to merino wool with the Ibex Women's Woolies Crew Top. This lightweight, long underwear top gives you super soft, temperature-regulating insulation.

Patagonia Capilene 1 Graphic Scoop Shirt - Long-Sleeve - Women's

From sunrise surf sessions to afternoons at the crag, the Patagonia Women’s Capilene 1 Graphic Scoop Shirt features a fully recycled polyester construction that manages moisture and some artsy graphics to keep you looking fresh.

Patagonia Merino 4 Classic Zip Neck Shirt - Long-Sleeve - Women's

On the skin track up and the epic turns down, the Patagonia Women’s Merino 4 Classic Zip Neck Shirt lets its moisture-wicking, odor-fighting, insulating capabilities really shine.

Marmot Lightweight Crew Shirt - Short-Sleeve - Women's

The Marmot Women’s Lightweight Crew Shirt wicks moisture and fights odors from the ski hill to the mountain trails.

Patagonia Merino 1 Crew - Long-Sleeve - Women's

Patagonia used a smart blend of merino and recycled polyester fibers to create the Women's Merino 1 Long-Sleeve Crew.

Ibex Indie Crew Top - Women's

With its versatile midweight Merino wool fabric, smooth feel, and semi-fitted design, the Ibex Women's Indie Crew will makes regular appearances in your workout wardrobe.

Marmot Lightweight Zip-Neck Shirt - Long Sleeve - Women's

Marmot made the new Women's Lightweight Zip Neck Long Sleeve Shirt with quick-drying Polartec Power Dry material and funk-fighting Cocona performance treatment so you can hit the trail harder without smelling like your socks.

Marmot Lightweight Crew - Long-Sleeve - Women's

Slip into the Marmot Women's Lightweight Long-Sleeve Crew whether you need a wicking antimicrobial base layer for your weekend adventure, or just a silky-smooth top while you wind down after a long day at work.

Backcountry.com Merino Crew Shirt - Long-Sleeve - Women's

Uncompromising in both quality and form, our Backcountry.com Women's Merino Long-Sleeve Crew Shirt offers the superior moisture managing, naturally anti-odor, and comfort of super-fine New Zealand Merino at a price that might make you pee a little.

Backcountry.com Merino Bliss Lightweight Long Underwear Top - Women's

With its soft, naturally odor-resistant 18-micron Merino wool knit and ½ neck zip, our Backcountry.com Women's Merino Bliss Lightweight Top covers you in functional comfort, minus the synthetic funk factor.

Mountain Hardwear Lightweight Power Stretch Zip Top - Women's

Keep your routes as versatile as the Mountain Hardwear Women’s Lightweight Power Stretch Zip Top. Quick drying and moisture wicking, this performance top helps you stay comfortable.

Icebreaker Nature Delta Scoop Top - Long-Sleeve - Women's

The low-cut scoop neck gives you plenty of room to breathe whether you wear the Icebreaker Women’s Nature Delta Scoop Top as a base layer for ski trips or your only layer for warm fall backpacking trips.

Icebreaker Nature Lite200 Vista Top - Long-Sleeve - Women's

The delicate prints on the Icebreaker Women’s Long-Sleeve Nature Lite200 Vista Top make it much more than a wicking merino base layer.

Arc'teryx Rho SL Crew - Women's

Bring along the Arc’teryx Women’s Rho SL Crew for a weekend of winter camping and stay warm inside the tent and out. Soft next to your skin, this ultralight base layer wicks away moisture.

The North Face XTC Lightweight 1/4 Zip Long Underwear Top - Women's

The North Face Women's XTC Lightweight ¼ Zip Long Underwear Top is far from a typical wicking base layer. Carbonized bamboo polyester fabric lets this top handle 50% more moisture than standard polyester can.

Spyder Dreamy V-Neck Top - Long-Sleeve - Women's

The Spyder Women’s Dreamy V-Neck Long-Sleeve Top is like the perfect date—thanks to its bamboo fabric, this base layer is odor-resistant and won’t leave you feeling clammy at the end of the day.