Description ** The only difference between the 2020 model and the 2019 model is the 2019 model doesn&';t have two small tabs that allow the use of the Mystery Ranch Daypack Lid. If you don&';t plan on adding the lid, this is a great bargain for the pack. With the same unique 270Adeg zipper access as the Beartooth, the new SAWTOOTH 45&&';;s low-profile silhouette and ingenious organization hit the mark for backcountry hunters. Built on Mystery Ranch&';s Guide Light MT Frame(TM) utilizing burly yet lightweight fabrications, it incorporates the patented OVERLOAD(TM) feature with a newly designed, quick-attach frame capture for easier access to the shelf for packing out your harvest. It&&';;s roomy enough for a fast and light overnighter as well as being perfectly suited for dawn 'til dusk hunts where coming out by headlamp is the norm. Sizing Small: Medium: Large: X-Large: 26"-32" waist* 31"-36" waist* 35"-40" waist* 39+" waist* 15"-20" torso** 15"-20" torso** 17"-24" torso** 17"-24" torso** *If you are in-between sizes we recommend that you size down. This will ensure that you have the ability to tighten the waist belt under a heavy load and or after having spent multiple days in the backcountry and having lost a few pounds. **The last picture includes instructions on how to accurately measure your torso. Specs Total Weight 5 lbs 4.8 oz Capacity 2746 cubic inches Dimensions 29" x 15" x 12" Hydration Compatible Yes - built-in sleeve and port Material 330D Cordura & YKK zippers Manufacturer Warranty Lifetime