Gepios Mens Underwear Low-rise Comfort Brief Germanium 92% CBA-TEX MODAL / 8% SPANDEX We use that presenting the worlds first in coating natural fabrics with pure germanium, CBA-TEX (CBA: Circulation Blance activated oxygen). We recommend you wear our Gepios underwear for at least two weeks in a row for the efficacy of Germanium. Efficacy of Germanium : Pain killer, Relaxing atopy, Preventing cancer, Strengthen immunity, Antiaging Effect # Waist_inch (S)30 (M)32 (L)34 (XL)36 (2XL)38 Machine Wash / Wash dark colors seperately