Improved for 2019 with new lighter weight material and water resistant stylish texture. Includes new SBS 2 liter bladder peva material with new improved bite valve and cover. Honeycomb ripstop material with SBS zippers. Includes 1 large 2 zipper pocket with pouch for 2 liter hydration bladder. 2 small zipper front pockets, 2 front mesh pockets, a resizable zigzag bungee for external storage, a clip for external storage, 2 resizable side straps with clips & reflective material on top of pack. Padding on back & straps for added comfort. Wide straps & easily resizable. Adj. breast & waist straps hold pack in place & take strain off of shoulders for added comfort. Approximate size: 19" x 13.5" x 4". 18 liter.