The Arc'teryx Ether Crew SS is a technical crew with moisture regulating fabric and mesh ventilation under the arms. -- Mesh underarm panels, antimicrobial finish -- Quick drying Helius(TM) fabric body wicks moisture and disperses it to accelerate dry time -- Mesh underarm and side panels aid in venting -- Flatlock seams reduce chafing -- UPF 50+ -- Athletic fit, hip... More