Dynafit designed the Enduro 12 Hydration Pack for long distance runs on roads or alpine trails. Breathable four way stretch mesh covers the back panel and vest like shoulder straps for breathability and full mobility. PU coated honeycomb helps the rest of this ultralight pack resist light rainfall and splashing. Hydration compatibility lets you pair the Enduro with your own reservoir, and there are two water bottle sleeves with secure drawcords. The Enduro also features trekking pole attachments, zippered pockets at each side, and a zippered front pocket for easy to access to your jacket.