These Rocwood chaps have Class 1 chainsaw protection and meet safety standard 1995 EN381-5. They have 9 layers of protective material and come in one size. They have a zip full length along the back of the legs and the belted waist has a quick release fastening. Front Protection : Type AMaterials:Shell 100% Polyester , Protective material 43% Polyester 57% Polypropylene, Lining 100% Polyester