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 = ""; } } }); Shoulder strap padding wraps to back for maximum comfort; Top pocket converts to a fanny pack; Rain cover included; Internal horizontal divider Green, lightweight polyester ripstop; Dual aluminum frame stays; Top load w/extendable top lid; Spindrift collar with draw cord "Over The Top" compression strap; Rescue whistle buckle on sternum strap; Hydration pocket and port; Front access to main compartment Front stretch neoprene pocket; Front wing lashing system; Side compression straps; Lower side bottle pockets; Lower extra-large door w/#10 zipper Torso Range: 16 to 22 Inch; Capacity: 5500 cubic Inch - 90L; Weight: 5 pounds, 9 ounces; SKU 2538807 Description Product Description The Caldera 5500 is a great internal to take along on all your backcountry treks. The Alps Mountaineering Caldera was designed with features to make your hike more enjoyable. Beyond the easy to adjust suspension system, front and side pockets, and hydration pocket and port, you can also find an internal horizontal divider to arrange your gear, side compression straps, and extra-large #10 zippers on the lower door. The top of the Caldera pack extends with a spindrift collar, so you can "over pack." The top pocket adjusts up and down to keep it in the correct position and we've included an "Over the Top" compression strap to stabilize your extra gear. The top lid converts to a fanny pack. If that's not enough, the rain cover is INCLUDED! You don't have to worry about spending additional money on accessories; you can find it all in the Caldera. This internal is a great example of what ALPS Mountaineering is all about... giving you great gear at an affordable price.