ASICS Men's Storm Shelter Pant 100% Polyester Imported Fit: Semi-Fitted--Slim, contoured fit for ease of movement and a stylish look. Fabric Type: Plain Weave--The most basic weave of horizontal yarns passing over and under each warp yarn in alternate rows Performance Technology: ASICS Storm Shelter--Storm Shelter provides protection from wind and severe elements while providing moisture management from the inside. Ventilation--Mesh or breathable fabric inserts in high heat zones allow sweat to evaporate and cool air to circulate. Reflectivity--Provides visibility in low-light conditions through the use of reflective fabrics, yarns, tapes, trims, or heat transfers.