Mens BOSS Three Pack of Invisible Socks in a Cotton Blend in black With a discreet cut for wearing with low-profile shoes these BOSS Menswear socks are rich in breathable cotton. – Silicone for grip. – Logo details. – Reinforcement at heel and toe. – 76% Cotton 23% Polyamid 1% Elastane. Machine washable. – Ref: 50541442-001 We regret that underwear is non-returnable due to hygiene reasons.