Our bestselling Allpa pack has transformed into a burly roller that puts four-wheeled bags to shame on cobbled streets. dirt roads. and stairs. Made from durable. water-resistant polyester and lightweight yet strong ballistic nylon paneling. the Allpa Roller Bag hangs tough. And it features the split-case organization our Allpas are known for to keep you dialed wherever you adventure. Also available in a carry-on-compatible 38L size.