Sturdy ABS Material - Made of high quality medical grade ABS and stainless steel material, the product is well constructed and sturdy, non-slip design, will protect your heel and calf muscles from hurt. Anti-Slippery Design - Features a textuRed surface and a plastic/rubber lip for heels to prevent my feet from sliding off the board. Easy to Usee and Carry - You can stand on it or sit on the chair, choose the right position, relief your muscle, keep your body health.These light-weighted foot slant board is suitable and flexible for use in home, office, travel and indoor-outdoor exercise,it is collapsible, very easy to carry. Adjustable Slant Board- This adjustable balance board helps to make your muscles and calf stretching which keeps plantar fasciitis flare ups away. Helps you stretch properly and Reduce the chance of injury. Easy to Use and Carry - You can stand on it or sit on the chair, choose the right position, relief your muscle, keep your body health.These light-weighted foot slant board is suitable and flexible for use in home, office, travel and indoor-outdoor exercise, it is collapsible, very easy to carry. Specifications: Size: 12"x10.6", 330lbs Capacity Weight: 3.7lbs Adjustable Angles: 0,20, 30, 40, 45 Material : ABS Environmental-Protect Material Package Includes : 1 Adjustable Slant Board