Uvex 3D hydroflex foam comfort insoles. Ultra breathable, moisture-absorbing materials. Great for Wellies, Work boots, Golf Shoes Etc. Ultra breathable and moisture-absorbing materials. Perforations for better ventilation. Fabric sole. 3D Foam material composition. Shock absorption zones that assist natural movement. Non-irritating, comfortable surface structure. Manufactured according to uvex climazone standard for maximum breathability and comfort.