To choose the best vape pen for yourself, you'll want to make sure that it looks comfortable for you to hold in your hand, as well as if it has a sunken cartridge design, and lastly its voltage settings. As portability is a key decision, make sure that its size specs on our product page will fit comfortably in the pockets that you'll be using with it Some vape pens have the cartridge screwed onto the end, while others have it hidden on the body of the vape Voltage settings are more important as they can mean the difference between relaxing and tasty sessions, or harsh-hitting clouds - 3.8 voltage is a middle ground which will give a combination of good flavor and cloud production