The Heys Earth Tones 21" Expandable Spinner is made of 100% pure Polycarbonate. It's available in warm earth tone colors and features a fully-lined color matching interior with zippered divider, buckled compression straps and large zippered pockets as well as an expansion system that allows for an extra 20% in packing capacity. The 360° dual spinner wheels allow for effortless motion in different terrains and the flush mounted built-in TSA approved combination lock will keep your valuables safe.