Sizes can vary from one brand to another, even from one model to another.
We recommend you always check the bottom size chart for each product before ordering.
-Elastane : also known under its commercial names Lycra and Spandex, the elastane fiber – which is extremely flexible - gets back to its initial shape after stretching. It is mixed with other fabrics like cotton in most underwear, especially when they are skin-tight.
-Polyamide : it is a resistant, flexible and quite elastic fiber. The most famous polyamide fiber is nylon, also called Tactel.