The Cudworth Sky Blue Silk Knot Cufflinks add a light, fresh note to formal and smart casual shirting. Built from two woven artificial silk knots joined by a flexible cord, they compress to pass through the buttonhole and hold the cuff closed with no metal to press against your wrist. Sky blue is an easy partner for navy, grey and tan, and it works particularly well with white shirting in warmer months. A practical, low-cost way to broaden a cufflink collection beyond metal. Materials: Artificial silk.