The brand is Mamia and They are the seamless or no show type. The crotch has a small piece of material different from the panties but I dont know if its cotton. I personally have lots of panties in this brand and I love them. They last and they are comfortable. I have many different styles myself and depending on what Im wearing that day I can choose which panties to wear. I know this is personal info and im not trying to get graphic....My main point is....I like this brand and decided to buy extra to share with you guys. I work at a wholesale place and when they came through....I grabbed a bunch. LOL