We've taken our O FIT Insole Plus and changed the top sheet to prompt wearers to "put a little soul in your step." - The trim-to-fit BFCT + O FIT Insole Plus 'Unity Blaze' is an upgrade in just about any shoe. Dual-density EVA throughout provides both cushioning and durability, and special reinforcement under the metatarsal and heel adds extra protection to high-strike zones.