· High-Quality Material: The Backpack made of high-quality Polyester waterproof fabric. Lining material is made of Lithium Cloth. Lightweight and comfortable for kids to carry books and related items. Water resistant, wear-resistant, durable and easy to clean. Better protection for the items in the backpack from getting wet, and easy to wipe down. The trolly bar are designed to carry enough weight and easy to pulled on the way. Hand wash only. · Suitable Size: The backpack size: 17 "H x 12 "W x 7 "D, Backpack weight: 1.60 lbs., Wheels weight: 2.90 lbs. Suitable for a variety of items, such as Books, computers, clothes, and other small items. · Comfortable: The Trolly backpack has shoulder adjustable padded straps and handles that can use as shoulder backpack without trolly. It?s convenient and easy to put on the shoulder and save the time. After correct assembly, the backpack can stay on the trolley stably without rollover. · Storage capacity: The 6 wheels boy trolly backpack with multi-pockets is design and convenient to carry what you need. 1 large capacity main pocket with compartment, 3 front zip pockets and 2 side pockets, easy to hold all for school supplies, such as tablet, books, homework folders, iPad, folded umbrella, water bottle, etc. Multipurpose: This rolling backpack perfect for school, travel, work; it is suitable for primary, middle and high school kids and adults. The age of the boys can use it is 5 years and up. Material: High-Quality materials: Polyester Waterproof Fabric and Lining material is made of Lithium Cloth. Care: Wipe clean or Hand wash Multipurpose: This rolling backpack perfect for school, travel, work; it is suitable for primary, middle and high school kids and adults. Exterior Features: 4 front zipper pockets; 2 side mesh hydration pockets; padded back for maximum comfort; water resistant bottom Interior Features: Padded tech/laptop sleeve; 1 mesh zipper pocket Handles: Soft Top handle and adjustable padded straps Weight: 4 lb Features: 1.? ?*Durability*: Sturdy materials like high-quality nylon, reinforced seams, and strong zippers. ?2.? ?*Wheels*: Smooth-rolling, sturdy wheels that can handle various terrains, including stairs and uneven surfaces. ?3.? ?*Handle*: The soft, and durable backpack handle is capable of supporting heavy loads. ?4.? ?*Compartments*: Multiple compartments, including padded sections for electronics (laptops, tablets), and organizational pockets for pens, notebooks, and accessories. ?5.? ?*Comfort*: Padded shoulder straps and a cushioned back panel for comfortable carrying when not using the wheels. ?6.? ?*Size*: Appropriate size for school use, with enough capacity to carry books, binders, and personal items without being overly bulky. ?7.? ?*Weight*: Lightweight design to ensure it?s not too heavy when fully packed. ?8.? ?*Stability*: A sturdy base that prevents the bag from tipping over when standing upright. ?9.? ?*Water Resistance*: Water-resistant or waterproof material to protect contents from rain or spills. 11.? ?*Design*: Aesthetic appeal, including colors and patterns that suit the student's preferences.