ObboMed SS-2720 360&deg; Rotation Lightweight Flexible Ultra-Thin Swivel Seat Cushion with Plastic ABS Base, Easy Movement for Back, Hip, Tailbone Pain Suffers, Size 15&rdquo; x 1&rdquo; Ultra-thin design for lower profile and portability Ball-bearing roller mechanism allows 360 turning without binding Durable plastic flexible base with slip-resistant bottom conforms to seat Not washable, clean with damp cloth Capacity: 130 kg/ 300 lbs Ultra-thin design make it portable and lightweight. Ball-bearing roller mechanism allows easy movement; 360 smooth turning without binding. Reduce strain and stress on your back and hip while getting in and out of car seat. Durable synthetic leather base has slip-resistant bottom. Flexible and easily conforms to most chairs. Clean with damp cloth for personal hygiene maintenance. Time-endurance household/vehicle essentials for those who suffer tailbone, back, and hip injuries. 1 x Swivel Seat Cushion Dimensions: Diameter 15 x 1 inches / 38 x 2.5 cm Padding Thickness: 0.4 inches / 1 cm Max. Support Weight: 300 lbs / 130 kg Color: Black Material: Polyester, EVA, PVC Latex: No