To wear this sport set, simply put on the backless top and then the leggings. It's perfect for various sports activities or casual outings. When it comes to cleaning, remember to machine wash it in cold water with similar colors to keep the fabric in good condition. Don't use bleach as it might damage the fabric. Tumble dry on a low setting, and avoid ironing and dry cleaning. Also, be aware that the size measurements are for the product when laid flat, and there could be up to 1 - inch variation in actual products, so choose your size carefully.