Half-cylinder padded design allows infinite positioning for ultimate comfort. Hypoallergenic medical-grade foam distributes weight evenly. Machine washable. Nylon cover with nonslip tread.  Ship Class Code: F Post-Consumer Recycled Content Percent: 50% Compliance Standards: GREENGUARD Certified Surface Features: Nonslip Surface Features: Machine Washable Weight: 7 lbs Adjustability: Multiposition...