ABOUT OUR SILICONE RINGS: 100% MEDICAL-GRADE SILICONE: Bio-compatible hypoallergenic non-carcinogenic and chemically inert. 100% NON-CONDUCTIVE: Electrical resistance measures infinity on an ohmmeter, high dielectric strength eliminating shock and burning during electrical contact. BUILT TO BREAK UNDER HIGH PRESSURE TO SAVE YOUR FINGER: Tensile strength measures 608 Psi average with a breaking point at an average of 19.65 lbs of force. Elongates 180% - 476% at break. ADJUSTS TO SWELLING: Our promise ring adjusts to swelling due to pregnancy, diabetes, injury or arthritis. Fit for color Brides will choose. Our bridal set will compliment any bride. HIGH-TEMPERATURE TOLERANCE: Can withstand a maximum temperature of +300C (+572F) and a minimum temperature of -40C (-40F). EXTREMELY COMFORTABLE: You won't feel it on your finger. We understand that in certain professional industries, metal jewelry is a big no-no for safety reasons. In this case, a ROQ silicone ring may be the perfect solution. They're made from safe, medical-grade, & non-conductive silicone. Some examples of these professions include (but aren't limited to): - Professionals - Firefighters - Police force - Army - Medical professions (doctors, nurses, paramedics, surgeons) - Hospitality workers - Tactical operations - Workout, fitness, exercises, and sports activities - Travelers - Outdoor enthusiasts. We manufacture silicone rubber rings/bands of the highest quality. As part of this process, our rings undergo stringent laboratory tests to ensure we provide our customers with 100% safe, hypoallergenic and medical-grade silicone wedding bands and everyday affordable rubber rings. ROQ team is always available for you 24/7!