The vango switchback 15 hydration pack is a compact and lightweight bag that has many pockets a helmet holder and even includes a hydration bladder making it ideal for cycling hiking biking or skiing the switchback is made from a durable and lightweight honeycomb polyester that offers great strength to weight ratio while the airwave back system along with the adjustable sternum strap and the waist strap make this bag incredibly comfortable to wear while you are enjoying your favourite sports thi