Royal Robbins Men's Bivy Short:
Lightweight and durable (they even have a double-layer seat), the Royal Robbins Bivy Short for Men is made for all your summer activities. The cotton/nylon blend has a UPF rating of 50+ as well as the quick dry of Dri X-treme. The Bivy Short may be even tougher than you are.

• Fabric: Bivy Ripstop
• 4.5 oz., 70% cotton
• 30% nylon
• UPF 50+
• Pre-washed