The Ultimate Performance Leader Race Vest has Two 500ml flexi-straw flasks included as well as a huge 6 litre cargo storage capacity. It also has 5 front pockets including two deep stretch mesh pockets and an easy access zip pocket for mobile phone, keys and other valuables. In addition it has loops for holding walking poles. 6 litre cargo storage capacity Five front pockets: two stretch-mesh deep front stash pockets, two secure front carry pockets (ideal for 500ml flasks), easy access zip pocket ideal for phone with key clip Pole storage loops Two rear pockets: one deep: bladder storage or accessory pocket, second double-sided quick access stash pocket Ultra-light wicking air mesh back and straps for ultimate comfort Double comfort stretch/easy slide adjust sternum straps Reflective detailing – safer at night Single finger zippers – quick and easy to use Weighs only 205g ( without flasks) One size: fits 30 ̋– 50 ̋ chest approx. LEADER RACE VEST 2x500ml FLASK PACK