V-shape for better load distribution. Front compression lifter for adjustable stability on the run * Large twin link for stability and breathing comfort. Harness construction for more comfort and stability. Lite EVA shoulderstraps. Airvent agility * Large stretch belt for comfort and stability. 4D lateral reservoir compartment. Soft 1.5 L bladder (included). 4D pole holder. Easy access bottle lateral storage * Main compartment with big puller. 2 compressible mesh side pockets. 1 removable chest pocket. 1 internal zipped pocket. 2 belt zipped pockets. Reflective. Whistle * Weight: 15 oz (3416g). Volume: 1037 cu. in. (17 Liters). Dimensions: 45.5 x 25 x 17 cm