Show your support for SOG with this 100% cotton t-shirt. Machine wash cold - Tumble dry low. Available in sizes Large, XL and XXL. This design includes the classic t-shirt design, as well as the SOG patch on the left shoulder, and Spencer Frazer's signature on the right shoulder. SOG Specialty Knives and Tools, Inc. was named in honor of the Vietnam War's only covert special warfare unit-The Studies and Observation Group.