Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to fit ski boots [title] Put on the socks you plan to wear while skiing. [step] There will naturally be a size difference between your bare foot and your foot in a wool sock. So be sure at every stage of the fitting process to wear your ski socks.

Ending1: [substeps] Make sure that your socks are clean and that they aren't heavily stained. It is very possible that mud and salt re-skins will clog the soles of the boots. Ending2: [substeps] It's best to wear thin wool socks when skiing. These will keep your feet warm, but still allow you to feel the sole of your boot as you ski. Ending3: Take out your floppy ski hat, mittens, and gloves and put on your ski boots. [substeps] If you are going to be wearing the boots (or other single layer, removable boots), wear some mittens. Ending4: [title] Get your ski boots ready to wear. [step] When your first boot is ready, you want to take the sock off and put on a pair of snow booties.

Answer format: ending1/ending2/ending3/ending4