【3D Arch Support Structure】 This flatfoot insole adopts an ergonomic arch support design, utilizing the principle of mechanical three-point support to provide support at three points: the ball of the foot, the arch, and the heel. It absorbs shock from each step during exercise and walking, evenly distributes foot pressure, and reduces fatigue. Recommended for those suffering from O-legs, flat feet, pronated feet, and plantar fasciitis, as well as those who engage in long hours of standing work, outdoor commuting, walking, school, exercise, or sports. The underside of the insole features a non-slip design to prevent slippage and enhance safety, also preventing injuries during exercise. 【Professional & Ergonomic Design】 FitFeet flatfoot insoles feature a deep heel cup that perfectly cradles the heel, increasing stability and correcting overpronation. The structured heel cradle helps keep your feet in the correct position and aligns your body properly. It improves balance and control during walking and running, reduces friction between the foot and shoe, and corrects walking posture. 【High-Quality Fabric】 FitFeet high arch support corrective insoles are made with high-quality velvet fabric. The top layer is sweat-absorbent and breathable, while the bottom layer uses wear-resistant and non-slip microfiber. The smooth fabric on top reduces heat and friction, providing a more comfortable, protected, and cool feel for your feet. Made with lightweight EVA material, these insoles do not add burden to your feet. 【Applicable Scenes】 With an ultra-thin design, FitFeet insoles fit comfortably in most shoes. These arch support insoles are applicable to most shoes such as sneakers, running shoes, boots, ankle boots, athletic shoes, leather shoes, and safety shoes. However, they are not suitable for shoes with limited space such as high heels, stilettos, sandals, and slippers. Size M: (Approx. 24.5-26.5 cm) Flatfoot Insoles, Shoe Inserts, Shock Absorption, 3/4 Length, High Arch Support, Plantar Fasciitis, O-Leg Inserts, Shock Absorbing Inserts, Running, Sports, Men & Women