MOUNTAIN EQUIPMENT CO-OP (MEC) This is a backpack from a Canadian outdoor manufacturer. The exact size is unknown, but it's a large capacity pack. Around 60 liters? A durable nylon blue and black backpack with adjustable straps and a mesh back panel. - Color: Blue and Black - Design: Backpack type - Straps: Adjustable straps - Material: Durable material like nylon or polyester - Back Panel: Mesh back panel Thank you for looking.