Quality materials and durable construction The lounge chair cushion is made with ultrasoft, skinfriendly polyester fiber. It features fine stitching for strength and durability. Polyester is crafted to resist fading and pilling, maintain shape, and be easy to care for. Upgraded extra thick filling for comfort The swing cushion is filled with PP cotton and provides 10 cm (4 inch) thickness. Concave and convex design helps prevent hip flare and offers a strong rebound, reducing pressure on the hips and allowing you to sit more softly and comfortably. Secure, nonslip fit Upper portion dimensions: 21 x 23 inches. All four ends tie to the back of the chair to prevent slipping. Lower portion dimensions: 21 x 21 inches. Back ends have straps, and the bottom includes nonslip fabric to secure the cushion to the seat and keep it in place. Wide compatibility and practical use Suitable for outdoor furniture and a variety of seating surfaces. Compatible with zerogravity chairs, sofas, tatami mats, benches, recliners, windowsills, and car seats. Ideal for camping, beach outings, and other outdoor activities. Use scenarios Relaxing in a backyard or patio zerogravity chair for extended comfort during sunny days. Camping trips or beach days where a soft, supportive seat is needed on uneven ground. Long car trips or infrequent seating on car seats to improve comfort and reduce fatigue. Gift and suitability A thoughtful cushion option for yourself, family, or friends who value comfort and easycare materials.