UNTUCKit Wrinkle-Free Short Sleeve Petrus Shirt in Men's Size XL. Excellent preowned condition Nothing beats the heat like a comfortable short-sleeve shirt in summer. Made from 100% breathable cotton, the Wrinkle-Free Short-Sleeve Petrus Shirt is the perfect style for the warm-weather months. This easy button-down features a bold, convenient chest pocket, the perfect untucked length, and our signature sail in bright red—so you know it's legit. Blue / gray color.