Knitted fabric, not stuffy when worn. Worn comfortably and lightly, no irritation, not tight on the legs. EVA Protection Plate Three - dimensional Pressure Thickened EVA protection plates for calves and insteps. One - piece wearing, fits the legs well and is not easy to slip off. Thickness: 1.5cm Thickened sponge Knitted fabric Hollowed - out Heel, Wear - Resistant and Shock - Absorbing The heels and toes are hollowed out. Knitted cotton fabric reduces friction and increases resistance, achieving the effect of wear resistance and shock absorption.