Internal linning is 100% Cotton, for extra warmth and comfort. Outer shell is made from 60% Wool, 25% Polyester, 11% Acrylic and 4% composed of other fibres, making this product of top quality fabric. Other features of this classic cut tweed breek are 2 side pockets, 1 back pocket with buttoned flap enclosure, strong brass front zip, velcro adjustable calf straps, dropped belt loops and elasticated grip waistband