ERGONOMIC DESIGN: Our folding beach chairs for adults patented ergonomic design, aligns your posture easing tension and providig maximum comfort and relaxation; With lumbar support and a special seat designed to prevent leg pinch and align the hips HEAVY-DUTY: The strong, reinforced frame with heavy-duty rivets of our camping chair improves stability; With its 20 seat and extra-wide feet, the Low Beach Chair is great for uneven surfaces such as sand, gravel, and even mud, preventing sinking