Wow, I never thought this jacket would be so good for this price! I havent worn it in cold mountains, but still I can tell you this is a great purchase! Ive used it for riding in my motorcycle (in bad conditions such as cold air and rain) and it works perfect! The good thing about it is its so light! It gives you plenty of movement! Its incredible, Its got tons of features such as pockets for iPod, phone, coins, and more. As you can read you can see it has 10,000k waterproofing, which for this price is unbelievable. For this price in other brands such as Special Blend and Burton you wont get much! As you can see, its all pros for this jacket! Its perfect! Soon I will be going for my first ride of the year, Ill let you know.