WKF Authorized - Since these Shin-N-Steps are WKF Authorized, they can be used professionally. Hook & Loop Closure - You can put these shin & foot guards on or take them off with ease and comfort thanks to the Hook & Loop closure. Detachable Technology - You can wear these shin guards with or without foot protection thanks to its detachable technology, which enables you to swap out the shin guards for foot protectors. Durable & Comfortable - made out of 100% long-lasting, high-quality cotton, which is incredibly soft on the skin. WKF Twister Karate Shin and foot protectors are a necessary piece of equipment for kickboxing or mixed martial arts. If you don't use protective shin guards, striking with your shins during sparring could be harmful to you and/or your partner. With these Twister shin protectors, you can strike with all of your available tools with confidence.