Don't fully inflate pool floats in the sun

Hot sun makes floats pop, and cold water just makes them look flat—so the trick is to under-inflate.

It’s not about losing air faster. It’s gas physics. When the sun heats a float, the air inside expands and pressure climbs until the vinyl gives out. That’s why you hear pops on hot afternoons. Cold water does the opposite: the air contracts, so the float looks saggy and under-inflated. It didn’t lose air, it just got denser.

As for “ideal pressure”—there is no number. General rule: stop pumping when the float feels slightly firm but still has some give when you press a finger in. If you plan to leave it in direct sun, aim for about 70–80% inflated. That leaves room for the air to expand without putting the seams under stress.

If the float looks flat in the morning, top it off after it’s been out of the water for a bit, not while it