Yes, the rash guard can be used for swimming. A rash guard is specially designed to protect you when you are in the water no matter the sport you are doing. Most people wear it for water sports like swimming, surfing, and even scuba diving. The options are endless, making it the perfect item to get when you go into the water. The only thing you need to do is ensure you get it in the right fit and style. You will also need to get some swim shorts because they cannot be sued on their own so keep that in mind. Pairing it up is not so hard since it is mostly made in neutral colors and patterns that are easy to pair up. Get yourself a rash guard, and you will not need any extra costume for when you are in the water, it is a multipurpose garment for you.