QALO Men's Functional Silicone Rings with Ring Storage Pouch, Perforated Classic & Q2X Collection QALO Classic silicone rings provide a safe, comfortable, functional and extremely durable alternative to the traditional wedding ring Features a traditional silhouette for a comfortable, classic look Temperature tolerant from -75F to 575F, and non-conductive and non-porous Tensile strength: 17lbs of force to break QALO rings fit true to size; half sizes should size up