The entire footbed is made of open-cell polyurethane for better heat dissipation and air circulation

Crafted from high-quality poly-cotton blended twill fabric

UPF 30+ sun protection

Contoured open-cell polyurethane footbeds

Secure hidden zippered pocket

Washed Duck Sherpa-Lined Sierra Jacket, Black Shirt Size:3XL The entire footbed is madeDescription Engineered For High Warmth in Severely Cold Conditions. See Technology section below for more details. Features 12 ounce, 100% ringspun cotton washed duck Sherpa lined body for warmth; Quilted nylon sleeve lining for warmth and easy on and off Attached sherpa lined hood with hidden drawcord Pleated elbows for ease of movement Internal rib knit storm cuffs help keep out the cold Pleated bi swing back for extra stretch across the shoulders