Opened brief with 100% combed cotton fabric. Designed for men with allergy or atopic skin problems. Its totally natural material prevents the appearance of any reaction on the skin and perspires without retaining moisture. The fabric is the so-called 6x4 interlock (vertically arranged lines), which offer great softness and strength, as well as elasticity, although the fabric is 100% cotton. The fabric is anti-pilling and the colors resist the washes.