Osprey Duro 1. 5 With Flasks Hydration Vest Run Free The Duro 1. 5 Vest includes 2 soft flasks to keep you hydrated while trail running, scrambling, or on fast-paced hikes. With a snug, running vest design, it's breathable, adjustable, and secure to eliminate bouncing while you move. With stretch pockets, trekking pole attachments, and space for a reservoir, set off into the mountains to crush a new personal record without the essentials weighing you down. Features Stay hydrated all day with 2-500ml soft flasks that fit into chest pockets for on-the-go drinking (reservoir compatible but not included)Snug running vest with an adjustable fit and anchoring straps to eliminate bounce Breathable 360-degree mesh back panel, enhances airflow to keep you cool Adjustable sternum and hipbelt straps, for a secure and customized fit Multiple pockets, provide organized storage for essentials with six stretch pockets, vertical-zip front pocket, and two zippered rear compartments Trekking pole attachment, for easy storage when they're not in use Reflective details, for visibility in low-light conditions MFG#: 10007317SPECIFICATIONSIntended Use Trail Running Fit Men's Specific Capacity1. 5 LMaterialbluesign(R) APPROVED, 85% 70D nylon (100% recycled), 15% spandex | Contact Mesh: bluesign(R) APPROVED, 100% recycled 75D polyester airmesh Accessories Included2x 500ml Soft Flasks with removable stabilizers (1. 4 oz / 40 g per flask)SIZINGSize SMLChest Circumference34. 5" - 37"37" - 42. 5"42. 5" - 46. 5"Dimensions15. 7" x 13. 8" x 1. 2"16. 5" x 15" x 1. 2"17. 3" x 16. 1" x 1. 2"Weight0. 44 lbs / 0. 2 kg0. 46 lbs / 0. 21 kg0. 48 lbs / 0. 22 kg | Osprey | Duro 1. 5 With Flasks Hydration Vest | Black | S Hydration Pack | Nylon