The Black Diamond Cirrus 9 is the lightest rucksack on the market coming in at just 28g (1oz) and has an volume of 9 litres. It stuffs into its own internal pocket and ultimately ends up smaller than an egg, this makes it the perfect travel companion or emergency pack.**Details:**- 1 ounce- Innovative Splice Adjust shoulder strap adjustability system- Super lightweight nylon fabric- Stuffs into its own internal pocket **Specs:**- Volume : 9 L (550 cu in)- Average Stock Weight : 28 g (1 oz)- Materials : Ultralight Nylon 15D Black Diamond Cirrus 9 | Daypacks | BananaFingers