NFS insoles are built for natural foot-shaped footwear with a wide forefoot and tapered heel. Designed for shoes with removable insoles, the NFS uses a flat, flexible zero drop platform with a 5.5mm stack height to maintain a consistent feel underfoot. A dual-layer construction combines a responsive PU foam top layer with a textured EVA base for lightweight rebound, flexible feel, and everyday durability. Available in 8 trim-to-fit sizes, these insoles are made for runners, walkers, hikers, and anyone looking for a flexible replacement insole for wide toe box shoes. No built-in arch support. Not a rigid orthotic or corrective insert. Natural Foot Shape: Designed for wide toe box footwear. Fits many standard wide toe box shoe shapes with a broad forefoot and tapered heel. Not intended for traditional shoes, shoes with non-removable insoles, or standard wide shoes. Zero Drop Flexible Platform: A 5.5mm zero drop stack height keeps the foot level from heel to toe while adding a layer of protection and rebound. Flat and flexible by design, with no built-in arch support. Not a rigid orthotic. Responsive PU Foam Top Layer: Medium-feel PU foam provides responsive rebound without feeling mushy, bulky, or overly cushioned. Built to move with your foot while maintaining a consistent underfoot feel. Textured EVA Base Layer: Dual-layer construction pairs the PU foam top with a firm yet flexible textured EVA base. Designed to sit cleanly underfoot during running, walking, hiking, and daily wear. 8 Sizes + Trim-to-Fit Design: Available in 8 sizes for a more precise fit. Trim with scissors if needed using your original insole as a guide.