ht at your child's waist level, helping him in his posture.Lightweight- Is your child carrying a heavy load? Don't add on to the load with a heavy bag. The small size Bixbee backpack is around 0.45kg only!Comfortable - Bixbee backpacks are specifically designed for kids’ unique measurements. The small backpack has padded adjustable shoulder straps and padded back panel, making bag carrying a comfort.