The Air Adjust suspended framed back system & large two way zipped opening that runs over three sides make this lightweight Vango Ventis Air Pro Rucksack ideal for backpacking & travelling This 45 litre rucksack has an Air Adjust vented back system which is adjustable & has an ergonomic adjustable padded hip belt to personalise the fit The frame is a concave design to keep the pack away from your back to allow maximum ventilation & comfort making this pack ideal for uses in all seasons The large main pocket has a two way zip opening so you can get easy access to the contents of your bag if you need something from the top or the side then you can just open the zips in the chosen area or you can lie the bag on its back & fully open it more like a suitcase In addition to the main compartment this bag has a zipped pocket on the lid with an internal key clip two elasticated side pockets a large stash pocket on the front ideal for stuffing your waterproofs or extra layers in & daisy chain looping on the front to attach extra gear too There is also a raincover included in the bottom zipped compartment walking pole attachment points & this bag is hydration system compatible making it a fantastic choice of bag for taking on your next adventure