Pure silicone, these teethers are very easy to clean. Simply wash with mild soap and water, or throw them on the top shelf of the dishwasher. You can also put these in the freezer for added relief when those painful teeth start poking through. Our teethers are made using 100% food grade silicone. They are non-toxic, which means no BPA, lead, PVC or phthalates. SAFETY CERTIFIED (CCPSA, ASTM F963-17, EN71 Parts 1, 2, 3).