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.
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.
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.
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.
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.
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.
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.
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.
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.
The men's Mountain Hardwear Air Mesh Half-Zip pullover may look unassuming, but once you have it on, you won't need anything else. Its active mesh fabric keeps you comfortable in a variety of temps.
Offering coverage on desert multi-pitches, high-alpine approaches and hot crag sessions, the men's Black Diamond Alpenglow long-sleeve crew shirt fends off sun, sweat and overheating.
A go-to for urban outings, far-flung travels and trail adventures, this men's Outdoor Research Astroman long-sleeve sun shirt keeps you moving with easy stretch and UPF 50+ sun protection.
Sunny crag days get a little bit better in this button-up. With built-in UPF 50+ sun protection, the men's Outdoor Research Astroman sun shirt protects you from harsh rays while on the wall.
There's a reason it's a bestseller. The men's Outdoor Research Astroman technical sun shirt delivers UPF 50+ protection and ultimate stretch for all your trail and urban outings and travel adventures.