Wheelchair Seat Cushions (18"x16"x3") for Sciatica, Back, Coccyx, Pressure Sore and Ulcer Pain Relief, Memory Foam Pressure Relief Cushion with Removable, Breathable & Waterproof Fabric

1.The cushion makes a non-slip bottom design and adds a removable strap to help secure the wheelchair cushion to a wheelchair or other chair 2.Made of high grade memory foam that better responds to your body temperature, evenly distributes weight, and relieves tailbone pain and spine pain 3.The cushion cover is covered with a waterproof membrane that protects the memory foam from perspiration or urine, and it can be removed for machine washing (please do not wash the memory foam). There are also ventilation holes on the buttock cushion to ensure sufficient air circulation and avoid body heat retention. 4. The unique U-shaped cutout design allows the tailbone to float, thus reducing pressure and tailbone pain. 5.Fits most wheelchairs approximately 17“ - 18” long and 16“ - 17” wide