The Primero 70 Backpack uses The North Faces vented back panel to provide excellent air circulation and keep you cool during scorching hot days on the trail. When the temperatures spike and your hiking partners look like theyre ready to melt, youll be nice and cool while air flows along your back. The Primero 70 Backpacks perforated waist-belt keeps your hips from overheating. The North Face also added the pivoting X Radial frame system to move with you as it supports loads up to 70lbs. Not available for shipment to Canada.