These RHS endorsed boots feature 4mm neoprene; these wellies can be rolled up, or down and worn as an ankle boot. The high-traction rubber outsole holds in muddy conditions, along with breathable air mesh lining keeping your feet cool on warmer days. Brand: Muck Boots Upper: Rubber+Neoprene, Lining: Neoprene, Sole: Rubber Heel Height approx. 2cm. These boots are 100% waterproof and fully lined with 4mm neoprene for comfort.