The Kirkland Signature Men's Briefs combine our 100% combed cotton fabric and reinforced seams to produce one of the most durable and comfortable briefs you've ever worn. The Kirkland Signature Men's Briefs are treated with the AEGIS Microbe Shield, a revolutionary antimicrobial technology which provides protection against odor, staining and deterioration. Permanently bonded to the fabric, the AEGIS Microbe Shield combines with the durable heavyweight cotton fabric and reinforced seams to produce one of the most durable and comfortable briefs you've ever worn. Just the kind of quality you expect from Kirkland Signature. 100% combed ringspun cotton. Machine wash warm. Separate from dark colors. Non-chlorine bleach when needed. Tumble dry low. Warm iron if desired