I bought a new cap press, so I needed some caps to decorate. I decided to go with an inexpensive option. These 6-panel caps certainly feel different than structured caps, but don't mistake their unstructured nature for flimsiness. They have a relaxed and comfortable fit and are easy to work with on a cap heat press. I did not need to use any foam or other padding on the bottom platen. You should be able to use them on a flat heat press as well. I might test that out later on one of mine. You do have to keep the front seam in mind when using HTV on these caps. Thinner HTV and heat transfer paper might not be a good choice. Even puff HTV can show the stitching of that seam. I'm a bit of a perfectionist, so I really noticed it at first. But people who have received the finished product are not complaining. I'm waiting for an order of 5-panel caps from the same company so that I can really get this part of my business rolling.