The GoLite DriMove womens Long Sleeve Top lets you get your spring runs or hikes in without catching a chill.

The Patagonia Capilene Silkweight Crew is constructed from Patagonias fastest wicking, quickest drying fabric.

The Marmot Silkweight Crew with long sleeves is an amazing base layer ideal for high output sports in cool temps. And it looks fabulous so you can wear it alone on warmer days.

The Marmot womens Midweight Crew Long Sleeve top is a great base layer for those who prefer to avoid the collar zipper pile-up.

The North Face El Cap Shirt is a versatile moisture wicking shirt thats become a classic among mountain enthusiasts.

The North Face VaporWick Light L/S Crew is a base layer youll be glad to have on warm days and sweaty, punishing ascents.

The Arcteryx Womens Cairn LS Crew takes a relaxed approach to active layering.

The North Face VaporWick Long-Sleeve crew has impressive moisture wicking and quick drying properties.

The Patagonia Capilene Lightweight Zip-T is an amazing wicking base layer it keeps you warm when its cool and cool when youre working out.

The Marmot Midweight Zip Long Sleeve is made of soft, stretch, waffle-knit fabric with a cozy brushed inside. Sounds good, huh?

Patagonias Seamless Long Sleeved T is a breathable, body-hugging long sleeved T that provides next-to-skin insulationa great base layer or workout top.

The North Face VaporWick Mid zip is a vital component of your winter outfit.

The Mountain Hardwear Butter Hoody is made with vertical performance in mind. Hit the crags in slacker style with this simple but functional hoody.

Patagonia makes their Airius Eclipse Crew for high-output spring and summer activities. When moving quickly on the trail you dont want clothing that slows you down or makes you overheat.

The Patagonia Capilene Midweight Zip-T is densely knit in a soft, brushed construction for loft and heat retention.

The Arcteryx Womens Blaze Zip LS is ready for fall.

The Icebreakers Skin Chakra Zip is a versatile base layer for women with an athletic cut and high zip-neck.

The Icebreakers Oasis Crew is a great all-around lightweight base layer made from the ultimate breathable insulation: Merino wool.

A Womens Rho SL Crew Neck Long-Sleeve from Arcteryx is extra lightweight and smooth.

The Arcteryx Womens Ether Long-Sleeve Crew is the lightest choice for a performance baselayer.

The North Face Aurora Zip Neck fleece shirt is a perfect layer for everything from skiing to backpacking to brisk walks across campus.

The Arcteryx Womens Ether Logo LS Crew offers ultra-light performance.

The Ibex Woolies Rib Zip T-Neck is a lightweight, high performance base layer made from Merino wool.

A Womens Rho SL Crew Neck LS from Arcteryx is an extra smooth base-layer with flair.

An Arcteryx Womens Rho LT Zip Neck Top is the ideal foundation for backcountry travelers.

The Patagonia R.5 Top is the lightest of the Regulator series and deceptively warm.

For freezing Scandinavian winters or cold days anywhere else, the Ibex Norse Crew is a versatile, midweight 18.5 micron Merino wool base layer.

The North Face womens Moxie Hoody is a versatile high-performance high-intensity hoody designed for tough workouts win cool weather.

The Patagonia Womens Expedition Weight Fleece Zip-T is a great midlayer for arctic ascents.

A Patagonia Womens Axuwool Long-Sleeved Zip-T gets the best from three hardworking fibers.

The Arcteryx Rho LTW Zip Top for women is the perfect base layer for cold and damp winter days. Made from fine Merino wool, the Rho LTW has a natural ability to move moisture and resist odors.

A Womens Rho Top from Arcteryx is a durable and soft way to layer for cold weather activities.

The Icebreaker Womens Original Long Sleeve Zip gives you the comfort of New Zealand Merino in a mid-weight layer perfect for skiing or snowboarding insulation or a cozy winter shirt.

Put on the Wind Shield Top from Patagonia to eliminate the windchill factor. This form fitting top is designed to stop wind from cooling your core when running headlong into cold weather.

The Shak T-Neck Jersey may well be the ultimate performance midlayer.