Lightweight and long-lasting, the men's Ortovox 120 Cool Tec Fast Upward T-shirt has a self-cooling effect and robust construction to help you keep up the pace on mountain terrain.

Shirts ParentShirts

Don't get slowed down at the crag! Comfortable, cool and quick-drying, the men's Ortovox 170 Cool Vertical T-shirt has a casual cut for optimum freedom of movement for those athletic moves.

Shirts ParentShirts

All the trail gear you need for 85 years and counting—show your love while you're out and about in this short-sleeve REI Co-op 1938 graphic T-shirt, which celebrates the year REI Co-op was founded.

Shirts ParentShirts

Serving up heritage styling and warm-weather comfort, the men's Fjallraven 1960 Logo T-shirt is a lightweight, quick-drying staple for everyday adventures.

Shirts ParentShirts

Soft, lightweight and made from organically grown cotton, this men's Patagonia 73 Skyline Regenerative Organic Pilot Cotton T-shirt is a tee you can feel extra-good about.

Shirts ParentShirts

Made for intense workouts in cold conditions, the Craft ADV SubZ Wool long-sleeve T-shirt 2 blends wool for warmth with polyester for transporting moisture when you're working up a sweat.

Shirts ParentShirts

This convenient garment is made for trekking and outdoor life in the summer. Plus, the men's Fjallraven Abisko Hike shirt is super packable, so it's practical when space is limited.

Shirts ParentShirts

From 5k to ultra, the men's RaidLight Activ Run Zip T-shirt is a great lightweight choice for all types of running and all distances.

Shirts ParentShirts

The men's REI Co-op Active Pursuits half-zip shirt stretches four ways for easy mobility on the trail, and offers breathable warmth for comfortable lounging after your run.

Shirts ParentShirts

Moisture-wicking and quick-drying, the men's REI Co-op Active Pursuits long-sleeve T-shirt protects you from morning chill, midday sun and trailside brambles.

Shirts ParentShirts

With a new softer feel, the men's REI Co-op Active Pursuits 2.0 quarter-zip shirt is ideal for cool-weather workouts: warm before and after; breathable and wicking so you don't overheat during.

Shirts ParentShirts

Daydreaming about summer days on the trail? Include the REI Co-op Active Pursuits T-Shirt and imagine yourself staying supremely cool and comfortable on those sunny switchbacks.

Shirts ParentShirts

The months of early morning runs and cross-training have paid off—now that you're toeing the starting line, it's time to kick into high gear in the moisture-wicking adidas Adizero T-shirt.

Shirts ParentShirts

Head off-road for a quick hike and then head back into town in comfort and confidence in the men's Marmot Aerobora shirt. Its heathered slubbed fabric breathes well and dries fast.

Shirts ParentShirts