Amarillo has some of the harshest weather conditions in Texas. It can be cold and windy or warm and sunny, all in the same day! We created the Amarillo Ripstop for weather like that. It's made with 6 oz. poly/cotton ripstop and the finish is very soft for such a tough shirt. It will keep you warm in the cool and breaths when it heats up. It's the perfect layer for the cooler months. Made in USA and sizes up to 4XLT!