4 wheels system (360 degrees),Outer Material: Polycarbonate, Inner Material: Fabric, Casing: Hard. From The house of Tramp & Badger with beautiful printed pattern according to their choice.Lock Type: Zipper, Number of compartments: 1, Capacity- 16 kg, Water Resistant, Light Weight , Handel type: Extendable, Dimensions - 23 x 15 x 10 Inches ,The most important component for baggage wheels is toughness and quality. The coolest thing about spin wheels is they don't require much quality or control from you.Polycarbonate material is extremely lightweight allowing you to pack more while avoiding excess weight surcharges. Polycarbonate is extremely durable, designed to absorb impact and flex back to its original shape.