WARRANTY AND QUALITY: K-POP Demon Hunters - Official ARTIST presents the junior school backpack adaptable to trolley with 2 years warranty UNIQUE DESIGN: Made of a very durable polyester material and smooth zippers. Easy to wash. Great for everyday use SPACIOUS AND LIGHTWEIGHT: Side bottle holder pockets. Double pull on main zipper for easy opening. Large format front pocket ERGONOMICS AND COMFORT: Padded back and shoulder pads, ergonomic, comfortable and adjustable. Hand handle on top RESISTANCE AND DURABILITY: This product is specially designed with durability in mind, made with high strength materials to ensure that it can be used in all kinds of activities, ensuring its functionality