Product Name: student Trolley Bag Applicable gender: neutral / male and female Applicable school age: primary school Material: PU leather Bag size: medium Capacity: 36-55L Inner structure of the bag: zipper pocket Opening method: zipper Function: waterproof, breathable, wear-resistant, burden reduction Lining texture: nylon Accessories type: drawbar Lifting parts: telescopic handle Product Category: Schoolbag Six rounds to adapt to various terrain, easy to climb stairs, recommended for student farther away from home to use Quality pull rod:The aluminum alloy rod can be stretched and retracted freely, and the bearing capacity is super strong, and it is not easy to deform, which can make you use it for a long time! Multifunction wheel:When the three wheels encounter obstacles, they will exchange automatically. It's easy to climb stairs, and the road with poor walking conditions will be more stable! Buckle design:The buckle on the bag is connected with the tie rod to strengthen the stability of the bag！ Mass storage:Two oversized spaces with compartments and a small removable shoulder bag are enough to meet all the needs of students to store books and stationery! > Schoolbag waterproof:The surface school bag is made of polyester, so you don't have to worry about getting wet in the school bag when it rains for a short time.