Orvis Classic Collection Gray Check Tech Shirt Men Large Outdoor Lightweight EUC. This gray shirt with a large white check pattern is from the Orvis Classic Collection. It is a collared short sleeve button up with functional chest pockets. This shirt is not vented, but it is lightweight and breathable - giving it great versatility for wear. It can be worn casually, for outdoor activities, or dressed up with khakis. 100% polyester. Measurements and condition shown in the photos.