therefrom as shown in fig2 and 3 to provide a thermal barrier space 42 insulating air in space 42 keeps main lens 20 somewhat warmer than auxiliary lens 38 in cold environments thereby reducing fogging of the goggle system lenses also but forming no particular part of the present invention facepiece 12 may be louvered as at 44 and or perforated or otherwise vented to provide for a change of air in the space between the wearer 39 s face and main lens 20 thereby keeping the humidity within the goggle facepiece at approximately the outside humidity and reducing the tendency for fogging from perspiration according to a particular feature of the present invention auxiliary lens 38 which may be colored and or light polarizing for subduction of glare and or the intensity of light reaching a wearer 39 s eyes is elastically pivotally harnessed to the goggle system 10 thus lens 38 may be released unsnapped from main lens 20 and moved above or below facepiece 12 to a position of storage snugly against the head or headgear of a wearer the auxiliary lens attachment means comprises elastic straps 46 each having one of its ends fixed to lens 38 by a snap component 40 and releasably pivotally connected to headband 24 by a snap fastener 48 straps 46 are free to pivot about the respective axes of fasteners 48 during manual adjustment of lens 38.