This is the Kryptek Valhalla 2 Long Sleeve Zip Shirt. Kryptek is an American company that manufactures high-performance apparel and equipment for hunting and outdoor activities. The Valhalla 2 is a long-sleeved shirt made of lightweight, breathable, and quick-drying material, featuring Kryptek camouflage for effective concealment. It's suitable for outdoor activities such as fishing and hunting. The shirt in the image has a black and gray camouflage pattern and a zipper on the chest. I've only worn it once for fishing, so it's almost new. Thank you.