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 toecap is used to allow complete freedom of toe movement. An anatomically tapered backpart to hold your heel snugly and comfortably in place, eliminating "heel slip" and increased mobility. A built-in footbed provides all-day comfort and support. The footbed fabric cover absorbs perspiration.