Made from 18 oz non-pilling Polar Fleece. These boots have a synthetic rubber sole of Tough-Tek fabric for added grip. The sole extends to the top of the boot to form a durable toe-cap. These boots are cut higher than most others on the market which helps to keep them in place. They are slotted at the opening to make it easier to slip on the paw and can stretch width-ways to make it easy to slip-on like a sock. The real secret to these boots are the two elastic loop straps that provide superior and secure closures, making sure these boots stay on!