We all need to cover our lips with sunscreen in the summer.  Most of the wrinkling, shrinkage, pre-cancers and skin cancers on lips are due to sun. 

We all like the Jack Black SPF 25 Lip Balm.  Very moist, nice applicator and comes in grapefruit, lemon, mint, vanilla and a black tea/berry flavors.  Has a shea butter/avocado oil base.