evo.com | Mountain Hardwear Long Underwear Tops > Don't underestimate the power of a well-engineered layer like the Mountain Hardwear Airmesh Long Sleeve Crew. Constructed from a unique active mesh Teijin fabric with a brushed backer that effectively moves sweat away from your skin, the Airmesh Crew works constantly to regulate your temperature whether you're sucking air on the final summit push or resting at basecamp. Raglan Sleeves for Extra Mobility Side Seams to Prevent Chaffing Active Mesh Teijin Octa 100% Polyester Crew Neck Ventilating Mesh Fabric with Brushed Backer | Mountain Hardwear Airmesh Long Sleeve Crew 2022 - Medium Yellow | Polyester