Ergonomically designed, mini cell foam has an increased height and hook profile. This accommodates the natural shape of the hip and eliminates compression and pressure points. Once in place they will not move or shift out of place. Available in three thicknesses (S-L), small for large boaters L for small boaters.) This eliminates the mess and fuss of gluing and sanding multiple shim pieces to achieve the perfect fit. Easy peel & stick installation. Two per set.