The Octane 18x is a 3-liter / 100oz hydration pack with a unique zippered expansion section that can be opened to accomodate more stuff or closed to shrink and center the load.
Feature list from Camelbak:
ANTIDOTE™ RESERVOIR FEATURES: Quick Link™ System, 1/4 turn - easy open/close cap, lightweight fillport, dryer arms, center baffling and low-profile design, patented Big Bite™ Valve, HydroGuard™ technology, PureFlow™ tube, easy-to-clean wide-mouth opening
KEY PACK FEATURES: Ultra-light materials, center expansion zip, essentials pocket, quick stash overflow storage, front and back reflectivity, safety whistle
DESIGNED TO CARRY: Extra layers, ultra-light weather protection, food, head lamp, trail maps, compass, trekking poles
CamelBak® Got Your Bak™ Guarantee: If we built it, we'll Bak it™ with our lifetime guarantee.
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