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What Our Gearhead(R) 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.