I love my feet and my feet love Spenco. Heel Cushions. Helps prevent heel pain. Ultra-Fresh Silpure - Exceptional odor control through advanced silver-based antimicrobial. Improves performance. Absorbs shock. Comfortable and lightweight. Durable and machine washable. 4-way stretch fabric with Ultra-Fresh Silpure: Helps prevent blisters while controlling odor. Closed-cell nitrogen-injected Spenco material: Exclusive cushioning layer absorbs shock and impact to provide maximum comfort. This unique cushioning system helps absorb shock, reduce friction and improve overall foot comfort. Heel cushions are tapered to fit comfortably in your shoes.