Properly maintained shoes can last for several years. It is necessary to regularly use footwear care products to maintain leather and restore surface water resistance. If waterproof shoes are not maintained and treated with water resistance, the waterproof and breathability of the waterproof fabric will not be damaged, but it will affect the breathability, durability, and comfort of the shoes. Use the water repellent recommended by the brand company. A. Leather protective wax spray or brand specific wax spray can be used to evenly spray the shoes 2-3 times, which is beneficial to extending the service life. B. Water resistant treatment: After drying non leather shoes, use a water resistant agent for treatment. Water can invade from the seam line, and waterproof agents can improve the waterproof degree of the upper and seam line. Newly purchased shoes must be repeatedly coated with waterproof agents for a period of time. C. Applying oil to the tongue of the shoe can prevent leather from making noises, and applying oil to metal parts can prevent them from oxidizing and rusting.