Mountain Warehouse Storm Backpack - Waterproof Rucksack Waterproof  The fabric is PU coated with a water resistance up to 10,000mm , perfect in heavy rain conditions Capacity  15 litres, for daily commute, holidays and walking Air Mesh Shoulder Straps  Soft and breathable, this travel essential is contoured for ventilation Straps  At the chest and waist help to stabilise the bag and distribute the load securely and comfortably Highly Reflective  High vis detailing to make you more visible at night and low light environments