MATTR (Materials, Technology & Research) is the performance fabric designed for the highest level of comfort no matter the climate condition. Featuring technical moisture-wicking, fast-drying fabric, with breathable, four-way stretch and a lightweight feel, this material will give you everything needed to go low.UPF 40 Moisture Wicking 4-way Stretch Fast-drying Hand Pockets & Back Left Welt Pocket Attached inner shorts with side pockets Sits at high waist 92% Polyester Recycled, 8% Elastane