We've dialed in everything adventurers love about the Astroman fabric and created a custom cut for women that takes into consideration backpack belts hip-hugging harnesses and pocket placements. Meet the Women's Astroman Sun Shirt: Our best-selling lightweight stretchy and ultra durable fabric packed with the highest rating of UPF 50 sun protection. Named after the legendary climb in Yosemite Valley the Astroman was built for exposed and rugged climbs but works equally as well for hiking paddling backpacking - even dressing up for an evening out to dinner after the adventure. bluesign approved 84% nylon / 16% spandex Breathable Lightweight Quick Drying Wicking Movement-Mirroring Stretch UPF 50+ Tonal Rubber Snap Front Closure & Cuffs Hidden Right Hip Security Zip Pocket Crossover Back Pleat for Unrestricted Movement & Feminine Detail Drop-Tail Hem