Lightweight, wind-resistant alpine and rock-climbing jacket with UPF 50. The double-weave fabric is light, stretchy, and offers excellent mobility. Boasting UPF 50 for sun protection and a waist cinch that’s single-hand adjustable, the Super Chockstone Jacket makes a great second layer for most alpine pursuits. Materials: Body Fabric: Chockstone Doubleweave Softshell. Body Fabric Content: 90% nylon, 10% elastane