Why i need to wear ski pants and why they are good?

Ski pants protect you from the outdoor elements. Good ski pants are had waterproof and breathability ratings. Since skiing is a intense activity, you will sweat and need a pant that breathes as well as waterproof. You can buy ski pants insulated or noninsulated depending on how cold you get. Ski pants also are built with gussets at bottom that form around your boot and most have adjustable waist. Hope that helps.