Beaded Silicone & Wood Teething Rings combine our standard premium 100% food-grade silicone with naturally antimicrobial beech wood rings for new textures, sensations, and degrees of comfort to massage baby’s sore gums. Food-grade silicone is a softer experience, and wood offers a deeper pressure to relieve teething pain. BooginHead wood teething rings will not splinter or chip and are not treated with oils, stains, or varnishes.