Durable polyester fabric It has good elasticity and is resistant to contraction and stretching The top handle strap, adjustable padded shoulder strap, makes the shoulder strap fit closely to the shoulder, providing a comfortable back experience The backpack has strengthened the anti-wrinkle details at the bottom to ensure that the bottom of the backpack is firm and reinforced to protect the backpack The backpack is equipped with side pockets on both sides, which can hold items such as water cups and umbrellas, enhancing portability It is recommended to hand wash or wipe with a damp cloth. Do not soak for a long time and do not bleach