Home Spa Bath Lumbar Cushion - Custom Back Comfort Relaxation Bath Cushion Lumbar cushion made with open-air fibers allows air and moisture to flow through. Back rest is adjustable with Velcro closures for custom comfort. Mat provides ample slip-proof coverage for back and bottom. Quick drying and secures to tub with suction cup. 30" x 15". 1" thick back rest. Steam clean or hand wash.