100% Pure New Wool These Real wool Wheelchair Seat Covers have the unique ability to absorb perspiration, thus preventing the skin from becoming æclammy’. This allows the skin to breath more effectively; very important in pressure area care. Real wool is exothermic. Unlike polyester fleeces, wool can absorb up to 33% of its own weight in moisture without feeling damp (compared with polyester’s 5%) Wool will not feel cold even when damp. Real wool has a remarkable natural resilience: with the real Lamb’s wool high-density 1″ deep pile this distributes pressure more evenly giving immediate comfort and relief. Real wool has a gentle touch that prevents friction burns from abrasive materials. The Wheelchair Seat Covers are pretreated to enable the real Lambs wool to be hot washable up to 161F (71C) and autoclaved. The Real Wool Bed Fleeces can be washed at these temperatures up to 50 times and still continue to give softness and comfort to patients.