The EquaGel Adjustable Protector Cushion is 100% EquaGel configured in two-stages. This cushion has a pelvic contour for better weight distribution and positioning that can be adjusted for its depth. Wound care nurses, and other professionals in long term care facilities like the ability to adjust the contour and not have to continually monitor it as is the case with most air cushions. Features 100% EquaGel Included are two different bucket inserts that can change the contour shape and depth of therapeutic gel under the pelvis 1st Stage Upper surface has thin walls and a tight grid for comfort 2nd Stage Bottom has thicker walls and a wide grid for deep posture support 2 ” High Pelvic area is contoured and adjustable from ” to ” to ” to flat to assist the user in positioning within the wheelchair Fluid-resistant, vapor-permeable and flame-resistant cover Warranty18 months What is EquaGel and How Does it Work? EquaGel Adjustable Protector Cushion is a dry-polymer gel, almost rubbery to the touch. It has unbelievable tensile and compression strength and incredible durability; but these are not what make EquaGel special. Its most amazing feature is the column buckling. Column buckling refers to the way EquaGel behaves under weight. Each wall of gel is capable of supporting only a light load. When that threshold is exceeded, the wall of gel buckles into the hollow area between walls and passes the weight to the surrounding walls for support. This “buckling and weight-passing” happens instantly and repeatedly until the maximum surface area of pressing weight is evenly supported by largely equalized pressure hence our name, EquaPressure . The peak pressure points of the ischial tuberosities and the coccyx/sacrum buckle into the EquaGel feeling almost as if they are free-floating within the cushion while the thighs and buttock of the user are supported. 1 Each / Each