Tops Knives T-Shirt Operator XL XL TP. Specifications for Tops T-Shirt - Operator: Material: 100percent cotton Features of Tops Knives Operator Tee Shirt: 100percent cotton construction Pre-shrunk Package Contents: Tops Knives Operator T-Shirt Rep your favorite knife company in style while showcasing one of our best sellers the Operator 7. These cotton/polyester blend t-shirts are lightweight comfortable and great for casual or active wear.