The BILLY Goat Midnight Mermaid is engineered for individuals who need specialized footwear accommodations. Developed with certified orthotists, this shoe features a custom last that delivers extra width and volume throughout the toe box, vamp, quarter, and heel—essential for comfortable wear with braces, orthotics, and prosthetics. Dual removable 3mm insoles let you adjust depth to match your specific needs. The triple-layered warp knit polyester lining resists tearing and withstands daily wear. A lateral heel flare and subtle forefoot rocker work together to support natural gait propulsion. PDAC approved (L3202, L3203), this shoe combines clinical precision with everyday wearability.