Full windows make a huge difference in winter/hunting type weather.It is amazing the heat the center console area puts out with the window up.If you don't have a full window there is know difference in riding a bike or a snowmobile.

Not to mention the rain and snow it keeps out of your face.Without a full window,goggles are appropriate in a UTV just like a snow machine.

Summer..Dust is a problem.Full window and back window keeps the dust out but it is hotter than hell.Even with my window down at 1/3 mask,I sometimes wear goggles on rides with others,alone I rarely do or need them.

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Jayco