The Alps mountaineering, Caldera 4500 is a great internal to take along on all your backcountry treks. The 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 side compression straps, an internal horizontal divider to arrange your gear, and extra large #10 zippers on the lower door. All of these features will ensure that you're ready for a successful and organized hike. So now you're ready for your trip and your pack is full, but you still have a few things to take along... don't worry! 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. When it's time to drop the internal and adventure onto a smaller trail, don't worry about bringing along an additional small fanny pack, because our top lid converts to a fanny pack. If that's not enough, the rain cover is included.
 Features:
 Shoulder Strap Padding Wraps to Back for Maximum Comfort
Top Pocket Converts to a Fanny Pack
 Rain Cover Included
 Dual Aluminum Frame Stays
 Top Loading & Extendable Top Lid
 Spindrift Collar with Draw Cord
 "Over the Top" Compression Strap
 Hydration Pocket & Port
 Front Access to Main Compartment
 Front Mesh Pocket
 Multiple Side Compression Straps
 Lower Side Bottle Pockets
 #10 Zipper with Internal Horizontal Divider
 Small & XL Waistbelt Options Available
Specifications: - Torso Range: 17" to 23" - Fabric: Blue Polyester Ripstop - Capacity: 4500 in? (74 L) - Weight: 5 lbs. 15 oz.