Reviews Score Summary Nature Republic Sun Block is an exceptional sunscreen made with all natural active ingredients. This will be a top choice for anyone looking to protect their skin from the sun's harmful UV rays. It also works on whitening, nourishing and tightening your skin. Clinically tested, this safe and warmly recommended sunscreen is sure to please. 4.7 What is Nature Republic Sun Block? This sunscreen includes all natural Calendula and Chamomile extract that helps protect your skin during long exposures to the sun. It also works on whitening, nourishing and tightening your skin.