Under Armour Sportstyle Duffel Bag. Under Armour Sportstyle Duffel. The Under Armour men's bag of original material with STORM1 technology will protect your belongings. Side pocket with water-resistant zipper. Dual-wear option with removable strap. Internal zipped mesh pocket for better organization. Dimensions: 55x27x27cm, 40L. Technology: UA Storm (DWR surface layer Repellents water, but does not reduce breathability). Material: 100% Polyester