STRUCTURE: Outer features: 1.3-1.4mm thick drum dyed top-grain cowhide leather for excellent abrasion resistance. We offer the greater thickness of professional level than many other retailers. YKK zippers throughout. Stretchable Cordura fabric at the crotch, inner arms, behind knees and lower half of legs for perfect fit and ease of movement. Two zippered vents for perforation. Leather stretch panels at lower back and above the knees for greater elasticity. Velcro patches for attaching knee pucks are sewn on. Inside features: Removable CE approved high impact armors at knees, shoulders, and elbows. Removable Dual Density Spine Protector. Fixed Mesh Lining. One inside spacious pocket. Construction: Pre curved sleeves and legs race construction Dual stitched main seams for excellent tear resistance