Cock rings are made from a variety of materials, including silicone, rubber, metal, and leather. Silicone is soft, stretchy, and comfortable, making it a popular choice for beginners. Metal rings offer a more intense, firm fit, which can be ideal for experienced users looking for stronger constriction. Leather and rubber rings are adjustable and provide a unique aesthetic for those into BDSM play. The best material depends on your experience level and comfort—beginners often prefer silicone, while advanced users may gravitate toward metal or leather for a tighter feel.