What is "duffels"

Usage examples of "duffels".

Gym bags and oversize canvas duffels had been lined up in random clusters while the kids themselves milled around, engaged in various forms of horseplay.

I finally staggered to my feet, retrieved the two duffels, and crept through the dining room toward the guest room.

I tossed the paper on the counter, set the duffels on the floor, and crossed to my desk.