Features Hard shells with metal inserts at knees Leather stretch on seat & knees Elastic comfort inserts at groin, back of knees & calves Circumferential connection zipper Velcro for knee sliders Calf width adjustment Safety SAS-TEC protectors on hips & knees Safety seams (ISO 4916) Material doubling on the buttocks Material Robust 1.2 to 1.4 mm thick cowhide leather Elastic polyamide fabric Breathable mesh lining with elastic inserts Sizes 34-44 are standard sizes 19-21 are short sizes 72-80 are long sizes