When building a lean-to, the opening should be positioned away from the prevailing wind. This placement helps to minimize cold drafts and protects the interior from harsh weather. Typically, the lean-to opening faces a direction sheltered by natural features like trees, rocks, or land formations to provide additional protection. It can also be beneficial to place a windbreak or fire reflector parallel to and a few feet from the opening for extra warmth and wind protection. Sleeping with feet toward the closed end of the shelter further maximizes comfort and heat retention inside the lean-to.