Powerslide MyFit Fat Boy Dual Fit Liners. 3D anatomically shaped padding is used in differing amount layers, thickness and high-end foams. Heat moldable in the heel, but you may not want to as they feels great out of the package. Features 4-way stretch material at toe to cover two sizes and reinforced PU-leather on ankles for durability. Liner is thin at the toe, but much thicker at the heel and achilles. Silicone prints on the heel and sole increase grip to better power transfer. An integrated tongue and lacing increase control and comfort. Lace on their own for a better wrap, or to shell for improved heel lock. Recommended for hard shell boots used for urban or aggressive skating, with large volume to accomodate a thick liner.