The foundation of the Osprey Atmos 65 is Osprey’s Anti-Gravity suspension system that delivers outstanding ventilation and carrying comfort.The Anti-Gravity suspension system, a seamless backpanel composed of lightweight mesh extending from the top of the backpanel to the hipbelt that contours to the body to deliver outstanding fit and unrestricted movement. The Fit-on-the-Fly, hipbelt and easily adjustable torso length optimizes comfort on the trail. You can access your gear through the top of the pack or via a zippered front panel. The versatile floating top-lid is removable to shave weight but an integrated FlapJacket is always onboard to protect your gear from the elements. There are also two front panel pockets to keep essentials from going astray.Final touches on this state-of-the-art pack include the Stow-on-the-Go trekking pole attachment system, and ice axe loops for winter ascents. Technical Specs Material: 100 x 630D Nylon DobbyDimensions MD: 33 x 15 x 15 inchesDimensions LG: 35 x 15 x 15 inchesVolume MD: 65 LitersVolume LG: 68 LitersTorso Fit MD: 18-21 inchesTorso fit LG: 20-23 inches FeaturesAnti- Gravity Suspension backpanel is comprised of lightweight mesh from the top to the hipbeltDual zippered front pannel pockets COMPRESSION STRAPSDual upper side compression strapsFit-on-the-Fly hipbelt pads extends to accommodate different hip sizes while providing a custom fitFlapJacket provides compression and protection from the elements for the main pack compartment when the top lid is removedHarness adjusts via easy release cams to control torso lengthInternal compression straps to help stabilize the load.Removable sleeping pad strapsStow-on-the-Go trekking pole attachment system is designed to quickly attach and carry trekking poles while wearing a packThe floating top lid can extend to accept oversized loads or can be removed from the pack bodyTool attachment includes dual ice tool loops and clove hitch style bungee tie-offs AttributesCapacity SHIPPING  > $2-3 day Priority Mail through the US Postal Service or $4.80 First Class (U.S. locations only).  > Combined shipping on multiple auction wins: just add $1 for each additional auction won.  > I ship items quickly.  I can usually ship within 1 day of receiving your payment (sometimes same day).  > I use the eBay/Paypal shipment process.  So you will automatically receive a shipment notification email from Paypal with your tracking number.  Tracking numbers can also be found in My eBay.  PAYMENT  > Paypal is the only payment method that eBay will allow me to accept.  However with Paypal, you can use major credit cards.  > Payment is due within 3 days of auction-end (immediately with Buy It Now).  If you run into a problem meeting the 3 days, please let me know.  COMMITMENT TO SELL & BUY  Please understand that winning an eBay auction is a commitment for me to sell you the item and for you to purchase the item.  Non-paying bidders cause a lot of headaches for sellers.  So when you bid, please be prepared to pay if you win the auction.  Per eBay (http://pages.ebay.com/help/buy/bidding-overview.html):  “Bidding for items is fun, but keep in mind that each bid you make is a binding contract to buy the item if you win.”  RETURNS  I do offer IF I MAKE A MISTAKE, OR THERE IS A PROBLEM WITH THE ITEM. However, buyer’s remorse is not a valid reason for returning an item.  I accept responsibility at my end and I ask you to do the same.  If there is an issue, please contact me as soon as possible.  PHOTOGRAPHS & DESCRIPTIONS  I include very detailed photos of my actual auction items.  With eBay’s zoom feature, this gives a better view of the item than the naked eye.