These fund bracelets are made with cotton cords, coconut shell clasps, semi-precious stones, and lots of positive vibes. Coconut Shell Button & 100% Cotton Cord Adjustable 7.85" - 10.25" Can be worn in the water, but keeping it dry is the best way to protect from wear and tear. Our 100% cotton cords last longest when taken off before swimming and showering. Brass beads will tarnish naturally when exposed to salty air, skin cream, sweat, or perfume. Use a cloth to polish, or try shining your brass beads with soapy water or lemon juice and a light brush.