Alpaque Duffel Carry-on Traveler's Bag Forest Green / Espresso Brown. The Alpaque Duffel in its core essence is a composed and capable interpretation of what portability is. It is organized and reflective of each userâs lifestyle given its seamless ability to transition end uses. The Alpaque Duffel contains the versatility of a carryall duffle bag infused with a laptop carrier within and sized appropriately to carry on board flights.