All in Motion Womens Long Sleeve Mock Neck One Piece Rashguard Green Medium. This swimwear essential combines your favorite features of a rashguard with a cool swimsuit. A one-piece design makes for slick dressing while keeping everything in place, and long sleeves add extra coverage wonderfully paired with a UPF 50 rated material for protection from the sun. You can always adjust the coverage with the help of a full-length zipper down the front, making it easy to layer over your favorite swim top as you can pull down the zipper when you're feeling toasty. A mock neckline finishes the piece for extra coverage.