In case anyone is wondering about how well Matia's Bomasense sunscreen works, I want to say that I just got back from a week long trip to the beach.  Bomasense sunscreen SPF30 outperformed my sister's name brand SPF50 sunscreen.  I did not burn at all, while she had some burning.  I only had to reapply the sunscreen once after the inital application.  Also, there is no need to moisturize after being in the sun all day as Bomasense sunscreen has plenty of moisturizers in it.  My skin stayed moist and smooth.  I've used this sunscreen the past several years when I go to the beach, and it has always worked very well.  It seems to keep and still be effective after a few years too, so you don't have to buy a new bottle every year if you have some left over.  And, of course, it is gentle on IC bladders.