Engineered orthotic insoles designed specifically for individuals with O/X-shaped legs, calf external rotation, foot overpronation (pes valgus), and uneven shoe wear. Featuring a precise 'high outside, low inside' (外高内低) contour: 1.3cm elevation on lateral (outer) edge and 0.4cm depression on medial (inner) edge to realign foot posture and reduce excessive inward roll. The top layer uses breathable gray fabric with ergonomic arch support and heel cup stabilization; the base is high-density yellow EVA foam for shock absorption and durability. Ideal for daily walking, standing work, or light activity—improves gait efficiency, reduces knee/ankle strain, and prevents premature outer sole wear. No branding visible; generic medical-grade design focused on biomechanical correction rather than fashion. Suitable for unisex use across adult sizes. Not a footwear item but a functional insert accessory that enhances existing shoes.