If you're a trekkie, it time to represent with this hilarious Star Trek shirt featuring Mr. Spock giving his Vulcan hand sign and the phrase "Trek Yourself Before You Wreck Yourself." It's an excellent and funny choice for any fan of the show. This black, standard fit shirt is made of 100% cotton. Be sure to check out our Size Chart to get an idea of the average size and dimensions of this Spock Trek Yourself tshirt style. Check back often for some of our new Star Trek clothing and other Star Trek merchandise at great prices only at AnimationShops.com.