Ramble replacement top covers are the comfort layer for Ramble Performance insoles. They attach with low profile hook and loop. Replace your top covers whenever you need or get the Ramble Short and Ramble Thin replacement top covers so you get a perfect fit for all the footwear in your closet. Breathable, 5mm, 3-D molded top covers feature accommodating polyurethane foam. Covered with low friction, 100% recycled polyester fabric with anti-odor treatment. Replacing your Ramble insole top covers is fast and easy. Simply peel your old top covers off, starting from the front of the arch support. Line up the new top cover at the heel first, center the front of the new top cover over the arch support, and you are good to go.