To keep you cool and comfortable, the 13L rucksack benefits from a ventilated spacermesh backpanel. When you have had an eventful but tiring day sight-seeing, you can reach for your water bottle in one of the mesh side pockets.The Osprey Daylite 13 Litre Daysack is also designed to quickly attach onto an Aether AG, Ariel AG, Farpoint 80 or Sojourn, making this pack a convenient partner for your outdoor adventures.Ventilated spacermesh backpanelZippered panel accessInternal document sleeveStretch mesh side pockets - keep a water bottleSternum strap with emergency whistleSide compression straps - share out pack weight evenlyRemovable webbing hipbeltCompatible with Hydraulics and Hydraulics LT ReservoirCapacity: 13 litres