density foam core for lasting support: The cushion is filled with density foam that retains its shape over time, providing consistent support without flattening. This durable material is designed to withstand daily use while offering a plush feel. Ergonomic design for waist and back: Chamfered edges and an ergonomic curve better support the waist, help relieve pressure, and resist collapse over time. Versatile wedge pillow for sofa and bed: Ideal for back support while reading or watching TV on the sofa. When used in bed, it helps absorb upper body pressure and provides reasonable lumbar support to maintain a comfortable state. Removable, washable cover: The pillow includes a removable cover that is easy to clean and machine washable. It remains comfortable and durable and can also serve as home decor at the head of the bed or on the sofa, or anywhere you rest. Giftworthy and practical: Suitable to give to family, friends and lovers, elderly parents, or physical workers who need reliable support during daily activities. Use scenarios: Reading or watching TV on the sofa with enhanced back support. Resting in bed to support the upper body and maintain comfortable lumbar alignment. Prolonged seated activity or gentle lounging for people who require ergonomic posture support.