Whats the best way to offer an infant protection from the sun?

Umbrella, shade, hat. The best way to protect a baby from the sun is to provide shade, such as clothing, hats, umbrellas, stroller shades, tarps, tents, etc... A baby can sunburn easily, sometimes even through window glass. Using sunscreen can also help.
Sun . Infants should not go in the sun. Sunscreen is used if children over 6 months of age are exposed to the sun. A zinc oxide or titanium dioxide containing sunscreen is a good choice in addition to hats and sun-protective clothing.