The Vapor Howe 4L by Nathan is the perfect companion for your running and trail adventures! Designed for peak performance, this hydration pack combines lightness, breathability, and an anatomical design tailored to the male torso. With its 4-liter capacity, it allows you to carry all the necessary gear for your most demanding outings. The 2 included 340 mL flasks, equipped with a straw, make hydration easy during exertion. Additionally, the 2 front pockets provide convenient storage space for your smartphone, food, and small accessories. The main rear pocket is compatible with 1.5 L water reservoirs for extended hydration. Despite its advanced features, this pack remains lightweight, weighing only 295 grams. 2 included 340 mL flasks Weight: 295 g Nathan VaporHowe 4L - Trail running backpack | Hardloop