When choosing a 12-volt blanket, there are a few factors to consider to ensure that you select the right one for your needs. Size is important; you want a blanket that is large enough to cover you comfortably without being cumbersome. Material is also essential; look for soft, durable fabrics that can withstand frequent use. Additionally, check for features like a long power cord, which allows for easier movement within the vehicle, and a washable cover for easy maintenance.