100% recycled PU coated nylon 450D:
Top and bottom compartment can be separated: Just pull the zipper to separate the bag in two. Can come in handy when on the road when staying in a small space.
Hard bottom construction: Don't worry about grumpy or careless airport personel. The hard bottom will protect your belongings on the road.
Laundry compartment: Separate your dirty and stinky laundry from the freshies.