K9 Sport Sack® Air 2The Air 2 is the backpack dog carrier people know best. Available in sizes XS L, it is a durable, breathable mid level backpack perfect for smaller to medium size dogs. The Air 2 is offered at a reasonable price while including the essential safety and comfort features needed for a comfortable experience. This backpack is recommended for intermediate grade walks, hikes, public transportation, and bike rides. The Air 2 is constructed with durable