You want your whole body covered

I'm sorry to tell you, but if you really don't want to show any skin at all, there's no magic cover-up that covers it all while still looking super summery. The set shown here is a good option, although it's still showing a little belly. If you're dead-set against showing arms, legs, belly, and everything else, look for light-colored linen or terry-cloth sets in a flowing cut. If it's tight, it won't look beachy, but if it's loose and flowing, the breeze will catch it and it'll look more appropriate. Becca by Rebecca Virtue Wide leg cover-up pant and hoodie $39.99 and $49.99 available at Victoria's Secret.