Make a beach day out of it in the Tommy Bahama Mykonos Textured Shift Dress Cover Up in Coconut. The Mykonos Textured Shift Dress Cover Up by Tommy Bahama is made of 100% Cotton. The Mykonos Textured Shift Dress Cover Up is lined with pockets and features a split neck with thread tassels. For best results, handwash your Tommy Bahama swimwear.