The Hygge liners are made from high-quality neoprene and feature top lacing for an extra snug fit, with a heat-stamped ergonomically shaped tongue. They feature pre-installed shock absorbers and heel raisers, which are detachable with hook and loop. Fitted with an anti-slip patch on the heel and anti-pressure point patches on the sides, which can be moved and adjusted to preference. Each liner is lasted to true size for the ultimate fit, so we recommend choosing your actual shoe size when selecting the size for these liners.