Snow skis are always in pairs of two and are never singular. Snow skis can be very skinny and also very wide depending on how comfortable you are with balance and speed. To snow ski you need a snowy mountain or hill to give you momentum and give you the speed you need to ski.The equipment needed is a pair of skis, a helmet, gloves depending on the temperature, and a snowy hill of some sort.Learning to snow ski is much easier with a teacher, but can be practiced often if you live near a place where you can ski. Snow skiing is a sport that can make you feel good, but does take quite a few runs to get it