A foot bed or insole is the most important piece of ski equipment that you can have. Foot beds improve your balance, and balance is a major part of skiing. All feet need to be in asupported position up on the tripod of your foot between your first, fifth metatarsals, and your heel bone. The entire foundation of doing something athletic starts by getting your foot on your tripod, and when your foot is locked up in the foam, rubber and plastic, you need even more support.