The GoLite DriMove 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 base layer fabric which also happens to feel silky smooth to the touch. Great for athletic or casual wear.

The Mountain Hardwear Wicked Long Sleeve Tee has a comfy loose fit and mind-blowing moisture wicking capability.

Youll get a lot of use out of a Patagonia Mens Lightweight Crew. A shirt with this level of performance and comfort begs to be used daily.

The Marmot Silkweight Crew with long sleeves is the sickest base layer you could own for winter sports. Ideal for those who prefer a very lightweight base layer.

The North Face El Cap Shirt is a versatile moisture wicking base layer 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 Marmot Midweight Crew Long Sleeve top is a great base layer for those who prefer to avoid the collar zipper pile-up.

The North Face VaporWick L/S Tee will quickly become your favored companion for all your adventures.

Patagonias Capilene Midweight Long Sleeve Zip shirt is the ideal layering option. We like this zip top because - well - you can zip and unzip.

Marmots Midweight Zip long sleeve shirt is a cozy base layer with a shaped fit thats easy to layer without accumulating bulk.

The Patagonia Capilene Lightweight Zip-T is an amazing wicking base layer great for skiing, jogging, or just walking around town when its chilly out. Keeps you warm when its cool, and cool when youre working out.

The North Face Long Sleeve Translution Tek Tee is the first piece of tech clothing youll put on all year.

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

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 North Face TKA 100 Glacier zip is a soft microfleece pullover perfect for layering or just bumming around on a crisp spring day.

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

The Salomon Motomesh Crew long sleeve has become a cult favorite. Thats if you count skiers, snowboarders, hikers, mountain bikers, climbers, and professional loungers as a cult.

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

A Rho SL Crew Neck LS from Arcteryx is extra lightweight and smooth. Unique single knit polyester is loomed in Italy to be soft and nearly weightless.

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

The North Face El Cap Delta can be worn as either an ultralight fleece jacket or ultra warm base layer.

The Arcteryx Blaze Zip LS is for fast paced trail users.

The Arcteryx Ether Logo LS Crew floats along any trail.

The CW-X Pro Top Long Sleeve is quite simply the most technologically advanced training wear in the world.

Sugois Main T long sleeve shirt will soon become your Main T. Convector technology allows air to circulate, delivering you warm air throughout your run.

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

The Icebreakers Skin Mondo Zip is a big, zipper necked base layer perfect for intense skiing and riding.

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

The North Face Cirque Top is a comfy lightweight fleece base layer.

The Patagonia Capilene Expedition Weight Fleece Zip Tee allows you to stay warm and keep moisture under control in brutally cold conditions.

The Spyder Rush Func T-Neck base layer quickly wicks moisture away from your body to keep you warm and dry while you carve for glory.

The techy fabric and smooth jersey styling of the Spyder Thrill Func Crew Neck base layer gets you psyched to point em down the fall line.

The North Face Cirque Top Delta Zip is an awesome micro-fleece layer for winter sports.

The GoLite CTE Hoody is the ultimate insulating, wicking layer. Its ideal as a base layer in the cold or worn alone in cool temperatures for running, climbing, skiing, or just lounging.

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

A Patagonia Axuwool long-Sleeved Zip-T combines three hardworking materials for your comfort.

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

The Icebreaker Mens 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 comfortable winter shirt.

Put on the Wind Shield Top from Patagonia to eliminate the windchill factor.

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