You will receive 48 luminescent light bracelets. You can hook the ends together to make bracelets and necklaces. Once they start glowing, glow bracelets will last you all night. They will glow super bright for 8 - 10 hours. Then, they will start to fade out but may continue to emit some light for up to 36 hours. These glow bracelets are fresh from the factory. They were manufactured just a few weeks ago and guaranteed to be fresh when you receive them. Can't use them all in one night? They have a shelf life of 2 years prior to activation. Inside the glow bracelets are two chemicals that emit light or glow when they are mixed together. When you bend it for the first time, you break an inner tube. This mixes the two chemicals together. Just shake it up and presto -- it starts glowing like magic! These glow products are non-toxic. They are not radioactive and they are not flammable. They almost never break open, but if they do, the chemicals inside glow products can be washed off skin and clothes with ordinary soap or detergent.