The Under Armour Undeniable 4.0 Duffle in this Grey colourway features Under Armour's Storm fabric technology making the durable outer fabric water-resistant as well. There is also a range of pockets offering various storage options and various ways to carry this bag. UA Storm technology delivers an element-battling, highly water-resistant finish Tough, abrasion-resistant bottom & side panels 2 large front zipped organisation pockets