Internal Linning is 100% Cotton checked. Outer jacket (shell) is made from heavy-weight 100% waxed cotton making this waistcoat waterproof and windproof. Other features include 2 hand warmer pockets, 2 front bellow pockets, 2-way heavy duty zip with studded flap enclosure, corduroy collar, 1 inside pocket, and 1--% nylon lonning trim. Produced to the highest standards by a manufacturer of top quality countrywear and derby clothing. Please check our size guide against your waistcoat you would like to purchase.