There isn\'t a time of the year this rucksack isn\'t suited for. The Lowe Alpine AirZone Protrail 35:45 Backpack is perfect for hiking thanks to the breathable back system, adjustable fit and hidden rain cover. This backpack can be extended from 35 litres to 45 for the extra gear you might need to carry - ideal for when you struggle to repack your gear once you\'re already out and about.4 season hiking packLightweightAdjustable back systemAirZone back system - ventilated contact point between pack and back for extra coolingAdaptiveFit harness - sits comfortably on hipsTorso Fit Centro - adjustable back system for a fully customisable, comfortable fitSide compression straps - regulate load weight for easier carryingTop and side access - easily accessible gear throughout pack constructionVersatile pocket space - including mesh pockets, zipped front pocket, stretch hipbelt pockets and harness pocketsIce axe loopRaincoverFront elastic stowage cradle - for easy storage of additional itemsWalking pole attachment pointsCapacity: 35 litres + 10 litres with extensionMax load: 15 kgDimensions: 68cm x 34cm x 34cmColour: blackWeight: 1.65 kg