I used to wear lace-up steel toes to work. I wanted to get boots that were slip-on, but my concern was that they would be either too loose or too tight, and that they would work with my orthotics. These boots fit just right, and have maintained their snug, but not too tight fit with my orthotics in them. My old steel toes gave me blisters on my toes where the steel rubbed, but these ones are so comfortable I haven't had a single blister from them!! I do wear them with heavier, tall socks to prevent the tops of the boots from rubbing my leg. I will be getting them again when my current ones wear out!