Q. Sunumbra Sports and Sunkids UVA protection seems different but both are five star? ln EWG Sunumbra Sports UVA protection grade is 'excellent', Sunkids UVA protection grade is 'good' A. The percentage of zinc oxide in the 2 products differs slightly. Sunumbra Sports has 19% and Sunkids has 18%. This is the key ingredient that provides the UVA protection and I believe that is how EWG judges one 'excellent' and the other 'good'.