Delsey Luggage Helium Breeze 3.0 Lightweight Carry On 4 Wheel Spinner Expandable Upright, Green, 21 Inch Four multidirectional spinner wheels assure smooth maneuverability and stability on virtually any surface the user encounters and keeps weight off your arm Lightweight fiberglass frame with graphite corners for strength and durability Main material is constructed of durable 1682 Bullet Proof Ballistc nylon with EVA foam backing for long lasting use Trolley expands up to 2.5 inches for additional packing space