If you're in the sun this summer, don't sizzle like a silly sausage. Slip on a shirt, flop on sunscreen and slap on a hat. What's his number? That's the sun protection factor. The higher the number, the safer you are. Slip, slop, slap, slip on a shirt, slop on sunscreen and... No, he's got a high number though. Slap on a hat. Slip, slop, slap, na-na, in the sun this summer. Slip, slop, slap.