"This RAKUWA necklace is made of silicone material that is resistant to sweat and water. Perfect for water leisure and sweaty occasions You can wear it while you take a shower. Designed with sharp slash lines in a gentle form that fits easily into the neckline of your neck. The glitter is decorated with a touch of glamour. Silicone material dries quickly after wet with sweat or water. A sporty design with glitter for a gorgeous impression. Easy to put on and take off by pulling it off from left and right. Micro titanium ball is used on the back of the main unit.Material: Body: Silicone, Fastening Pin: Polyacetal .Technology: Micro Titanium Ball"