SQUASEM design concept originated from square geometry. Sturdy PP material and multi-functional storage design, SQUASEM durability beyond imagination. Full size expandable design, providing more energetic storage space. OPTIMOV™ vibration isolator, 1) depression 2) seismic isolation 3) telescopic seismic absorption. DUOSAF™ double-layered anti-theft protection, providing double protection for your trip, making your journey more secure.