U-Shaped Wedge features U-shaped perineal cutout. 3H base is made of rigid Super Constructa Foam covered with a 1 thick layer of our premium pressure management T-Foam™ (Temper Foam) for maximum patient comfort. Radiolucent blue nylon cover with water-resistant seams. 20L x 20W x 4H. Standard Wedge is a medium density Polyfoam positioner without cutout. 20L x 20W x 6H. High Wedge is high-density Polyfoam for highest hip lift. Covered in conductive, bacteriostatic black vinyl with waterfall construction, which eliminates two of the three 18 lengthwise seams for more fluid protection. All seams water-resistant. 20L x 18W x 9H.