The document provides instructions for building a quinzhee, a dome-shaped winter shelter made by hollowing out a pile of snow. The key steps are to 1) scout a flat, sheltered location with sufficient snow depth, 2) shovel snow into a large pile and pack it down, ensuring the pile is larger than needed, 3) allow the shoveled snow to harden through a process called "sintering", and 4) slowly dig out the interior to create sleeping space, an entrance, and shelves, taking care to reinforce the structure with support sticks as needed. Proper materials, location, and following the outlined process will result in a functional quinzhee winter shelter.