Ergonomic Design: Tilts the pelvis upright, cups the gluteus muscles, and encourages proper spinal alignment. Waterproof & Durable: Made with weatherproof EVA material, ideal for various environments including office chairs, car seats, and outdoor benches. Lightweight & Portable: Compact design with a built-in handle for easy transport. Universal Fit: Suitable for adults weighing between 100–300 lbs. Easy to Clean: Simply wipe with mild soap and water; do not machine wash.    Product Specifications: • Color: Sea Blue • Dimensions: 13” x 15.5” • Material: Waterproof EVA Foam • Weight Capacity: 100–300 lbs    Ideal For: • Office workers seeking improved posture during long sitting hours. • Drivers looking for enhanced comfort on the road. • Individuals experiencing lower back discomfort. • Outdoor enthusiasts needing portable seating support.  Never used.