The wood we use is beech wood. More than other types of wood, beech wood has an excellent antibacterial effect. We use 100% silicone beads. The silicone is 100% food graded, resistant to damage and free from harmful additives such as BPA, sulfates and other additives. Silicone feels soft and smooth. It is one of the few materials that is fully recyclable, which means less waste and a long service life.