The Bucket Boss Came Kneepads Have 600D Poly Material Surface To Prevent Scratching Of Surfaces. The Kneepads Have Molded Foam For Cushioning And Tricot Lining For Durability. Secure These To Your Knees With The Elastic Strap And Velcro Closure. These Kneepads Are Ultra-Lightweight So You Will Barely Notice That You Have Them On Your Knees.