The Echo Mountain Backpack by Columbia is a versatile 25-liter, hydration pack-compatible backpack with a main compartment, external zippered pocket, and adjustable shoulder straps for comfortable carrying on any adventure.Key FeaturesAdjustable shoulder straps for supportFront pocket with hook-and-loop closure secures valuablesHydration pack compatible and two water bottle pockets for easy access to water on the go (reservoir not included)Multiple grab handles for comfortable carryingExternal zippered pocketAdjustable sternum strap for support with rescue whistle on buckleLarge main compartment for bigger essentialsMore DetailsDaisy chain and bottom loops for gear attachment or trekking polesVolume: 25LDimensions: 47.0 x 26.0 x 17.0 cmMaterial composition: 100% Polyester