Heel Height: Approx. 11'' Tall. Ozone-resistant, abrasion-resistant rubber offers 100% waterproof protection. Rust-resistant buckles offer more durability and product life. The Z-Series overshoe rubber work boots are perfect for a muddy, messy jobsite. These overshoes are made of 100% waterproof, abrasion-resistant rubber and fit size for size over leather work boots. Traction comes from the self-cleaning chevron cleated outsole that won't track mud or dirt.