Custom Fit. The foot form ("last") used to construct these boots has been designed for maximum comfort and accurate fit. A larger, naturally shaped steel toe is used to allow complete freedom of toe movement. A single density polyurethane footbed provides all-day comfort and support. The footbed fabric cover absorbs perspiration and is removable for fast drying. The EXCLUSIVE 3 POINT HEEL LOCK SYSTEM is anatomically tapered to secure your heel comfortably in place and eliminate "heel slip" for increased mobility.