Features Enter your model number above to make sure this fits. P.when("RPPStripeRendered").execute(function(stripeData){ if(stripeData && stripeData.state){ switch(stripeData.state){ case "result-found": document.getElementById("replacementPartsFitmentBulletInner").innerHTML = "This fits your "+stripeData.item+"."; document.getElementById("replacementPartsFitmentBullet").className = ""; break; case "no-result": if(stripeData.showBullet && stripeData.showBullet !== "0"){ document.getElementById("replacementPartsFitmentBulletInner").innerHTML = "No information found for this part for "+stripeData.item+"."; document.getElementById("replacementPartsFitmentBullet").className = ""; } break; default: document.getElementById("replacementPartsFitmentBullet").className = ""; } } }); Built-in safety whistle Front and back reflectivity Center expansion zip Fixed 1-inch belt with cargo pockets Ultra-light 3D Mesh Independent SuspensionTM harness with gel pocket and SliderTM SternumStrap Description Product Description The Octane 18X Hydration Pack from Camelbak is expandable w/compression. It can hold not only your hydration but an extra layer, food, and other essentials. PRODUCT FEATURES: Hydration Capacity: 100 oz (3 L) Total Capacity: Open 1098 cu in (18 L)+ 3L Reservoir Closed 823 cu in (13.5L) +3L Reservoir CamelBak Got Your Bak Guarantee: If we built it, we'll Bak it with our lifetime guarantee. 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 BACK PANEL: Air Mesh HARNESS: Ultra-Light 3D Mesh Independent Suspension with gel pocket and Slider SternumStrap BELT: Fixed 1 in (25 mm) with cargo pockets Additional 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 61898 , Camelbak Octane 18X 100 oz Hydration Pack , day pack , water backpacks , hydration packs , hydration backpacks , bladder hydration , daypacks , hydrapak , hydration , hydration packs , hydro pack , water backpacks , water hydration , water packs