Glenmuir Mens Balfour Premium Waterproof Golf Jacket (Rain Bloc Range) Polyester, , The Glenmuir Balfour lightweight stretch waterproof jacket is part of Glenmuirs Rain Bloc performance outerwear range. With breathable lining and waterproof zips, the 100% polyester jacket features contrast panels and piping detail, a self fabric waist a. Fabric:100% Polyester. Chest (to fit) S - 36/38, M - 39/41, L - 42/44, XL- 45/47.