Underneath the Walter White costume, it's recommended to wear comfortable clothing that is easy to move around in. You want to make sure that your clothing doesn't bunch up or cause discomfort while wearing the hazmat suit. Many people choose to wear a simple t-shirt and shorts or pants, depending on the weather and personal preference. Some also opt for a compression shirt and shorts, which can help keep everything in place and prevent any uncomfortable bunching or chafing. It's important to note that the hazmat suit should be the outermost layer of the costume, as it's meant to protect the wearer from hazardous materials. Avoid wearing anything over the suit that could interfere with its protective properties. Have any questions, just email us anytime at cs@walterwhitecostume.store.