Descriptions: Relieve pains from hemorrhoids, bed sores, prostate, pregnancy, coccyx, tailbone pain, hip pain, post natal orthopedic surgery, herniated discs, sciatica back pain. Donut shape promotes good posture and healthy weight distribution evenly for long periods of comfortable sitting, creating a comfort space for your coccyx and tailbone, relieving pressure points on your back and hips, increasing blood circulation to the legs. The filling of the cushion is memory foam. It can provide long lasting comfort and relief, the cushion wont be squashed even after prolonged seating. It is lightweight and easy to carry around for travel. Great for use on any chair and seat in daily life and office as a perfect seat cushion for tailbone pain, on the road as a wheelchair cushion or a car seat cushion. Removable zippered plush cover is machine washable for easy cleaning, hollowed out design provide good air circulation and breathability in daily using. Specifications: Material: polyester Filling: memory foam Color: navy, coffe, rose red, sky blue, gray Size: about 45x41x7cm Package included: 1pc x seat cushion Note: 1. Due to the light difference, the items color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement. 3. Please fully charge the device under sunlight before first use. 4. If there is no enough sunlight in 3 months, the battery may run completely flat, and will decrease battery life, so please charge in time. Once its fully charged, unlock the device and lighting system. Otherwise, it wont work anymore.