Knee Pads for Roller Derby Enthusiasts The 187 Killer Pads are designed for Derby players and are indispensable gear for those who spend significant time gliding around the derby arena. Adaptable and Comfortable Knee Pads That Stay in Position While You Glide Experience minimal resistance as you straighten and bend your legs, owing to its flexible hinge and open-back design. Enjoy a snug and comfortable fit due to the seamless, quick-drying interior structure. These pads are lightweight with a low profile and slim configuration. The snug fit ensures the foam remains in place and prevents slipping down during movement.