Mountain Hardwear Women's Super Chockstone Jacket Nylon / Elastane 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 thats single-hand adjustable, the Super Chockstone Jacket makes a great second layer for most alpine pursuits Abrasion-resistant, air-permeable, lightweight softshell fabric Body Fabric Content: 90% nylon, 10% elastane