Desert shirt jacket by CAT. Putting a modern spin on workwear, this shacket is made from a crisp cotton weave, topped with a snap button closure and a medley of pockets. Historically rooted in the resource and construction industry, CAT knows workwear. CAT WWR is Caterpillar Workwear redefined, capturing the true spirit of American workwear with everyday products that focus on authenticity, ingenuity and craftsmanship.