Designed to mimic the gentle ripples of sand dunes. the Dune hardside 21.5" carry-on luggage is the latest addition to Tracker. Crafted from durable. scratch-resistant polycarbonate. the Dune luggage inspires a natural resilience only seen in in the landscapes of arid deserts. Finished with an efficient storage system. a secure TSA-lock. and an 8-wheel spinner system. the Dune luggage invites you to explore new horizons.