They consist of 95% cotton and 5% elastane, so they leave a pleasant sensation on the skin and are at the same time very elastic.
Because of the fine material is felt a really good fit. I usually wear M and that's here just the right size. The seams are very well made and the briefs sit very well.
Even after washing, they retain their good fit. I am very satisfied with this product, I really do not know what I can complain about here and like to give it 5 stars. Highly recommended.