Sand Pure Balance BriefConturelle Pure Balance Brief 213201. Looking for a basic brief that's both natural and soft? Try the Sand Pure Balance Brief. Made with high quality fabric, this underwear will become your go to for all day comfort. The nude color makes it perfect to wear under any outfit, without being noticeable. One of the key features of the Sand Pure Balance Brief is its softness. The fabric is gentle on the skin, making it perfect for those with sensitive skin.