Does anyone out there have the answer as to why Hasbro gave the Viper BOTH the silver/chrome full-face shield that is very much like Cobra Commander V1's AND a pair of goggles that usually are always just shown resting up on the helmet?

1. The face shield should protect the trooper's eyes from anything that the goggles would (and probably better), so they can't be for safety.

2. The face shield also probably protects against the sun's harmful UV rays (much like mirrored aviators sunglasses do), so they would be redundant as sun glasses.

Ideas?