The Ultra-Sil Duffle Bag is the ultimate in lightweight packable duffle bag, which can fold to the size of a tennis ball. Made from strong and durable 30D siliconized CORDURA® fabric, it also has an incredible 40L capacity and is strong enough to carry heavy loads. The perfect bag for airline carry-on, impromptu excursions, weekends away or just going to the gym, it's also compact and super light, making it an obvious choice as a spare bag on any trip.