The new Mountain Hardwear Stretch Ozonic Insulated Jacket Insulated Jacket is more than just a rain jacket. It has the stretchy, waterproof fabric you love from the original Ozonic™ with added insulation for soft, waterproof performance in colder precipitation. Underarm pit zips keep you from overheating and the raglan sleeves work well with backpack straps, so you can get outside no matter what the weather brings.