Key Features
Material:

Made from a PC + ABS (polycarbonate + acrylonitrile butadiene styrene) composite, combining lightweight feel with impact resistance.

Textured/grinding finish helps resist scratches.

Corner reinforcements (in some models) absorb shock.

Security:

Each suitcase has a TSA-approved 3-digit combination lock, which allows TSA agents to open the suitcase for inspection without damaging the lock

Zipper closure system.

Mobility:

360° double-spinner wheels: have four multi-directional wheels for very smooth maneuvering.

Telescoping aluminum handle (adjustable, often 3-step) for comfortable pulling or pushing

Side/top carry handles for easy lifting.

Interior:

Fully-lined interior.

One side has a zippered mesh divider pocket, the other has elastic cross-straps to secure your clothes.

In some sets (e.g., the Coolife set), the smaller suitcases nest (fit inside) the larger ones for convenient storage.

Expandability (depending on model):

The 28″ case often comes with an expandable zipper for extra packing space (~ +15%) when needed.