Spenco® Silicore® Padding Products are made with Spenco® Silicore® Fibres—unique siliconized hollow-core shafts that don’t mat down, retain their loft and allow air flow. The silicone coating lubricates each fibre to reduce friction and shear force while preventing moisture penetration or retention. The breathable cotton/polyester fabric is fully machine-washable, machine-dryable, and radio-translucent