walker and hawkes men's derby tweed shooting plus fours breeks trousers 38 light sage walker and hawkes 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