Our patented Silver Bicycle Bracelet is an understated yet stylish look. Hypoallergenic, Nickel and Lead-Free, Sweat and Waterproof. Material: 316L Stainless Steel Thickness: 4mm Width: 4.30mm Length: Various Sizes Available Closure: Single Fold Deployment Clasp Care: Pour some water in a small bowl and add some mild dish washing soap. Dip a lint-free cloth in the soapy water and gently wipe.