Koi Smiley World Solid Skull Skull Cap Details The Smiley World Solid Skull Cap is the perfect finishing touch to any outfit. Koi's new collaboration with Smiley World wants to spread joy and happiness, encouraging people to "Take the Time to Smile." Internal elastic Tie back Button for mask loops to ease stress on ears Size & Fit One size Fabric 97% Polyester/3% Spandex Koi item #SA174 Koi Smiley World Collection Koi scrubs and accessories are a popular choice for healthcare professionals who love to add style and personality to their look! Featuring an outstanding variety of colors and designs, this trendy apparel keeps you looking great without sacrificing comfort.