evo.com | Mountain Hardwear Activewear Shorts > The Mountain Hardwear Yuba Trail(TM) Onesie is a functional power suit for the outdoors. Crafted with stretchy fabric, a back thru-pocket to hold spare layers, and upper body support, its UPF 50 fabric and soft racerback strap cut is both flattering and functional for sweating it out. Standard Fit Not too tight, not too loose. Standard-fitting apparel will fit without restricting movement. Two Top Entry Mesh Pockets Performance Jersey | 78% Recycled Polyester / 22% Elastane Soft Elastic Racerback Straps to Prevent Chaffing Under Layers Low-Impact Upper Body Support with Medium Compression Throughout the Body | Women's Mountain Hardwear Yuba Trail(TM) Onesie 2024 - X-Small Black | Elastane/Polyester