Gorilla Floor Padding Cut and Sized to Fit 12ft x 20ft Rectangular Above Ground Swimming Pool * Sits Underneath Your Pool Liner for Added Cushioning and Extra Liner Protection - Extends the Lifetime and Safety of Your Liner and Pool / Cushioning Eliminates Footprints from Forming * Extremely Hard to Penetrate - Specially Designed Geotextile / Strong Felt-Like Material Approximately 1/8in Thick * Impervious to Cuts from Sharp Objects, such as Glass, Roots and Rocks, Virtually Eliminating Vinyl Liner Bottom Leaks! * Padding is Cut to Size and Seamed to Your Above Ground Pool- No More Cutting and Taping as with Foam!