What Our Gearhead® Experts Are Saying:"This shirt is my go-to for sunny days on the trail. The UPF 40+ protection is a must for long hours outdoors, and the moisture-wicking fabric keeps me cool and dry, even on hot, humid hikes. The anti-microbial finish is perfect for multi-day trips, and the flat seams make it super comfortable under a backpack. It’s lightweight, breathable, and ready for anything."The Sierra Designs Alpine Start Sun T-Shirt is the ultimate essential for sun-filled days on the trail, river, or mountain. Built with UPF 40+ fabric, this tee protects your skin from harmful UV rays, so you can focus on the adventure ahead. The lightweight, moisture-wicking material keeps us cool and dry, even during the most strenuous activities, while the anti-microbial finish ensures we stay fresh from morning hikes to evening campfires. Designed for outdoor comfort, this sun shirt features flat seams to prevent chafing and off-shoulder seams that won’t interfere with backpack straps. Whether we’re logging miles on the trail or paddling under a summer sky, the Alpine Start Sun T-Shirt combines performance and protection to keep us moving comfortably.