Home S1 Blog S1 Pro Knee Pads - Watch the Video - In Stock Now! S1 Pro Knee Pads - Watch the Video - In Stock Now! 7th Dec 2018 s1 helmets S1 Pro Knee Pads Specs: Streamlined Pad Design Military Grade Ballistic Nylon for durability Impact Absorbing Knee Cup with memory foam for form fitting comfort, shock absorption and stability on impact Triple Stitch construction for extra strength Articulated Butterfly Back Flaps for secure fit to prevent slipping and increased mobility High Abrasion Replaceable PC Knee Cap with ultra flat surface for stability. Perfect Length locking adjustment top strapsS1 Pro Knee Pads from S-One Helmet Co | S1 Helmets on Vimeo.