Outdoor Products 4124U-MSS Op Zenith Internal Frame Pack Moss Outdoor Products 4124U-MSS Op Zenith Internal Frame Pack Moss Features:; Deluxe multi-day hiking pack; Hydration compatible (bladder sold separately); Top loading with drawstring closure; Full length vertical zipper for easy access to all gear; Two oversized mesh side pockets hold water bottle, maps, etc.; Two removable aluminum stays ensures a perfect fit; Extra sleeping bag compartment; Ultra-padded back and removable hip belt is preserved to fit your hip; Reinforced, adjustable front compressor panel holds a shovel, wet tent or other bulky items; Multiple lashing straps and daisy chain loops for additional attachments.