Slows Hair Growth: Designed to slow hair regrowth in just a couple of sessions. We recommend usage on dry or damp skin after a shower. Using moderate pressure, simply rub the Crystal Hair Eraser on the desired area in circular motions. Apply to Any Part of the Body: Crystal Hair Eraser is safe to use on knuckles, arms, legs, chest, and back. However, we suggest not overusing or rubbing too hard. If you have sensitive skin, try it on your arms/legs first before you use it on other delicate parts. These areas are very prone to product overuse and overpressure. Rinse the hair and dead skin from the crystal hair eraser with water after use. Using Nano-Crystalline technology, the Crystal Hair Eraser allows the hairs to clump and break from the surface when rubbed gently on the skin. No refills or recharges are required and it is reusable for up to 3 years. Our hair remover is suitable for body parts such as knuckles, arms, legs, chest, and back We recommend not overusing or rubbing too hard If you have sensitive skin, you can try it on your arms or legs first before applying it to other delicate areas.