In 2013, the FDA began testing all sunscreen products for both UVA and UVB protection. If they pass and have both, they're now called "broad spectrum."
Only broad-spectrum sunscreens with an SPF of 15 or higher can claim to reduce skin cancer and early aging. Others can only say they help prevent sunburn.
The words "waterproof," "sweatproof," and "sunblock" are no longer allowed because they're untrue.