Brioni Hidden Button Down Linen Shirt Casual Shirts Harry Rosen Dark Blue Denim Shirt Button Down Eton Eton Slim Fit Linen Button Down Shirt Navy Blue at CareOfCarl.com Eton Slim Fit Linen Button Down Shirt Navy Blue at CareOfCarl.com. The Byron Hidden Button Down Shirt offers a versatile and stylish option for any occasion. With a hidden button down shirt collar and a variety of fabric options to choose from, this made to measure shirt is perfect for work or play. Whether worn under a jacket or on its own, it's a must have for any wardrobe. Outer: 100% Cotton , Woven In Italy Care: Cold Machine Wash (FM304601 1570)