LJJ Soft TPR Knot Non Slip Adult Safety Shower Bath Tub Mat, Mildew Mold Resistant (15-inch by 30-inch, White) Extra Soft Bubble design cloth pattern that gently massages your feet Made with ULTRA SOFT TPR material. 100% Latex Free. Mold and Mildew Resistant. Easy to Clean. Durable for years. Best when used on non-textured bath tub surface Safety First. Strong grip suction cups for max skid-resistant slip-free result Thermalplastic Rubber (TPR) is the high quality odorless material that feels like but is much softer than pure rubber, with no rubber or PVC vinyl odor