The popular Mini Mil series was designed for professionals looking to improve foot and lower leg strength through minimalistic form of walking and running. The Tactical Research TR102 Men’s Black Minimalist Training Boot features a smooth leather upper triple stitched for strength and durability. It is a true minimalist boot with a 2mm heel to toe drop. An unlined upper is ideal for hot weather to keep your feet cool. This is a training boot and not intended for intense athletic activity. If you have not worn minimalist footwear before, please transition into these boots gradually by wearing a few hours each day and increasing.