From the brand

With Interior Organization 30L

Without Shoulder Strap 25L

Padded Shoulder Strap 30&40L

With Shoulder Strap 25L

With Interior Organization 40L

Easy to Fold up 25L

✅ SAVE YOUR CARRY ON CHARGES -【Model：T1112】Bag size 18 x 13 x 6.3 inch fits personal item size 18 x 14 x 8 inch of Spirit Airlines & Frontier Airlines perfectly, which can be placed under seat and no need to pay carry-on.
✅ PACKABLE & LIGHTWEIGHT – Folding up when not use. Capacity 25L yet only 7.2 ounce offer the same packing space as a small suitcase – minus the weight and bulkiness.
✅ EASY CARRYING – Its external storage pocket offers quick access to small items. The pouch as a strap enables the duffel to fit over the handle of common suitcase 18 20 24 26 28 32 inch for easy carrying.
✅ VERSATILE – Easily held all your gym or travel items.