Feet are weird. They’re narrow, wide, flat, tall with high insteps, inflicted with bunions, or occasionally, sixth toes. Few types of shoes highlight these idiosyncrasies more than alpine ski boots. At their core, these boots are snug, stiff, firm plastic shells that skiers cram their feet into to enjoy the sport. Skiers’ boot preferences are as diverse as their feet. Some want a boot that they can easily walk uphill in while still retaining proficient downhill performance.