In this set you not only get three great sizes for every sort of trip, but you also get a duffle bag with an add-a-bag feature to make carrying heavy bags a thing of the past. Each case is ultra-lightweight and has four full spinner wheels, making it so easy to move around. The side handles are padded for extra comfort when you need to carry, and their durable material fabric resists dirt, stains, and abrasions like a champ. Each piece of luggage in this set is also excellent when it comes to packing organization, thanks to zippered pockets on both the outside and the inside, as well as interior compression straps that hold everything in place. Also, all of these bags expand up to 2 inches!