To use these socks, simply put them on your feet like you would with any other socks. They are great for daily wear or for adding a touch of style to your outfit. As for the warning, make sure to keep this product away from children and pregnant women. When it comes to maintenance, you can machine - wash them in cold water with like colors. Tumble dry on low to keep them in good shape. Avoid using bleach or harsh detergents as it may damage the fabric and the stripes.