1. Material: bio-silicone, environmentally friendly bio-glue
2. Weight: about 7 grams / a round, 6 grams / a plum
3. Size: 8cm diameter
4. Features: the gel-free position adopts a glue-free design, which is more comfortable and breathable; the use of bio-silicone is strong, durable, waterproof, sweat-proof, thick in the middle and thin in the periphery, and fits the curve of the chest.
5. Maintenance: gently rub the rubber surface with water or laundry detergent, let it dry naturally, and do not expose to sunlight.
OEM are Welcome! we can print customer's artwork and logo