ULTRAGEL Motorcycle Seat Gel Pad - PAD STOCK Series (18x16) MADE IN THE U.S.A. (Standard Shipping: Free 2-3 Day !!!). ULTRAGEL at 5/8 thickness. This product does not utilize memory foam. Reduces transmission of road impacts and bike vibrations minimizing rider-fatigue on long trips Two sizes available. Easily trimmed to your size needs. Will not leak if cut or punctured. All ULTRAGEL motorcycle seat gel pads include 18" x 16" smoothing foam with 1/8" thickness and installation instructions. Size: 18x16 in.