The Argali Yukon 8P Insert fits inside the Yukon 8P Tent to provide full double wall coverage for approximately 1/3rd of the tent, providing a comfortable enclosed sleeping area for up to 2 people with plenty of space for gear inside of the insert. The 8P Half Insert fits on either end of the Yukon 8P Tent, so you can fit up to two half inserts inside the Yukon 8P Tent and still have the center of the tent (between the center poles), free for gear storage or hanging out.