●At least 30lb bearing with high-strength aluminum alloy rod; Multifunction usage with Tilami armor bottom protection system ●Tilami personalized design of shoulder straps padded pocket make your wheeling time more convenient and fun ●Big storage capacity with Tilami large multi-compartment design can hold more belongings ●Suitable for different occasions with variety of Tilami personalized patterns ●All tilami rolling backpacks have the suitable size for all Major US Airlines. The backpack fit for kids over 4 year-old.