Women's Lightweight Long Underwear - Tops

Icebreaker BodyFit200 Chakra 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.

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

The North Face made the Women's Softwool ¼-Zip Long Underwear Top with Australian merino wool to give you all of wool’s natural benefits with a ridiculously soft feel.

The North Face Softwool Crew Long Underwear Top - Women's

Australian merino wool makes The North Face Women's Softwool Crew Long Underwear Top softer, warmer when wet, and less stinky than polyester—so what are you waiting for?

Arc'teryx Rho LTW Zip Top Long-Sleeve - Women's

The Arc'teryx Women's Rho LTW Zip Top keeps you warm and comfortable on chilly days thanks to soft, itch-free merino wool.

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.

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.

The North Face XTC Lightweight Crew Long Underwear Top - Women's

We know it sounds odd, but The North Face made the Women's XTC Lightweight Crew Long Underwear Top with carbonized bamboo polyester. Thanks to this unique fabric, the XTC Crew handles moisture 50% more effectively than a standard polyester shirt.

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.

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 Microchill Zip Top - Long-Sleeve - Women's

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

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.

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

An Arc'teryx Women's Rho LT Zip Neck Top is the ideal foundation for backcountry travelers.

Patagonia Wool 2 T-Neck - Long-Sleeve - Women's

Layer the Patagonia Women's Wool 2 Long-Sleeve T-Neck under your softshell for a ski-touring adventure or under a sweater for a romantic after-dinner sleigh ride.

Columbia Appalachian Travel Weight Top - Women's

After the sun sets, the Columbia Women’s Appalachian Travel Weight Top keeps you warm, and it also wicks perspiration.

Patagonia Wool 2 Zip-Neck - Long-Sleeve - Women's

Go for a trail run over lunch in the Patagonia Women's Wool 2 Zip-Neck base layer, and then head back to work without a shower.

Patagonia Capilene 1 T-Neck Top - Women's

Pull on the Patagonia Women's Capilene 1 Turtleneck Top when you cross country ski in the spring, climb in cool weather, or set up camp after the sun has gone down on a warm day.

Columbia Glacial Fleece 1/2-Zip Top - Women's

What should your ski ensemble consist of today? When you get up early to dress for a ski day your thoughts aren’t usually quite that clear, which is why Columbia made it easy for you—start with the Women’s Glacial Fleece ½-Zip Top.

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.

Under Armour UA Heatgear T-Shirt Long-Sleeve - Women's

The Under Armour Women's UA Heatgear Long-Sleeve T-Shirt gives you a snug, compression fit that reduces muscle fatigue.

Telemark Nation Heavenly Daze Crew - Long-Sleeve - Women's

Arc'teryx Rho LTW Zip Top - Women's

Soft, itch-free merino wool makes the Arc'teryx Women's Rho LTW Zip Top warm and comfortable on chilly days. This all-natural top insulates in a wider range of temperatures than a synthetic shirt.

686 Olivia Long Underwear Top - Women's

686 made the Olivia Women’s Long Underwear Top to fit snugly so it doesn’t bunch up under your jacket.

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.

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.

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.

Spyder Dreamy Mock Top - Long-Sleeve - Women's

Be the envy of pandas everywhere when you don the Spyder Women’s Dreamy Long-Sleeve Mock Top. Bamboo naturally resists odor and pulls moisture away from the skin.

DAKINE Paris Crew - Women's

When you land in Paris and begin the trek to the Alps, make sure to pack the DAKINE Women’s Paris Crew on the top of your bag. This lightweight single layer keeps you warm and dry on the slopes.

Foursquare First Layer Top - Women's

Put the boring monochrome top back in your drawer, and pull out the Foursquare Women’s First Layer Top for wicking and houndstooth chic.

Columbia Graphic Glacial Fleece Top - Women's

Your arms do a lot for you. The Columbia Women’s Graphic Glacial Fleece is a lightweight ski underwear top with flower decorations on the sleeves that let your arms know you care.

Isis Peony Crew Neck - Long-Sleeve - Women's

Slip into the Isis Women’s Peony Long-Sleeve Crew Neck before facing Old Man Winter. Its lightweight nylon fabric layers easily under a mid-layer while its seamless construction won’t rub you the wrong way.

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.

Mountain Hardwear Micro Chill Zip Shirt - Long-Sleeve - Women's

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