The rubber used is obtained from old bicycle tubes. • The earrings are made of 18K gold and/or 925 sterling silver (min. 90% recycled). • Perfect for everyday use or as a unique gift. • Waterproof, rustproof. (Only a sample image, the bracelet may slightly differ in appearance from the picture.) The silver/gold is produced according to legal regulations for labor and environmental protection. Proceeds from the sale go to coastal and nature conservation organizations. Let's advance regional environmental protection together!