I would bring your own. We wasted a LONG time trying to get the mask to fit DS right. It was leaking and freaking him out. Took over half an hour to finally work out that his head shape was actually causing the kid's size mask to not work; he and I swapped and he was better. The adult size fit him better, and I could deal with the leaking. He and I ended up running out the time of our sunscreen because of that extra half hour, and we ended up with toasty backs.