1.100% silicone quartz watch 2.3ATM water proof 3.ROHS and CE and SGS approve 4.All color available 5.OEM welcome 1. Material: silicone strap, 100% eco-friendly silicon , non-toxic, odorless, soft and comfortable.or PU strap is ok.2. Certification: All the material can meet the standard of ROHS/ CE.3. Features: Digital dispaly,waterproof, eco-friendly, variety bright color. Easy to wear/remove, ...