Vaseline Original Petroleum Jelly works by locking in moisture and giving your skin's own natural recovery mechanisms a little boost. Vaseline is gentle on your skin, hypoallergenic and doesn't clog your pores, making it suitable for nearly everyone. It is particularly effective at helping dry and cracked skin to recover, simply apply liberally whenever needed. Vaseline also helps to protect your skin from outside elements so is a must have on cold days.