Skin Gym Body Brush in Beauty: NA. Experience the intense stimulating and toning power of Skin Gym’s Body Brush. Made with natural cactus sisal bristles, this energizing brush to leaves your skin bright, fresh and even.. Helps stimulate and detoxify skin. Designed for use before showering or bathing. SKGM-WU9. 855331008399. Skin Gym is dedicated to advocating a natural self-care beauty ritual, Skin Gym believes in promoting an enjoyable and healthy skincare routine. Inspired by ancient beauty techniques, the brand’s mission is to go back to basics by offering a variety of modern beauty tools that give your skin a healthy workout and an uplifting experience.