[Boots]

direct wind in on the lower legs during the summer. They turn them out during the winter to take advantage of the engine heat.

Just for clarification on this, the deflectors are not completely 'in' during the hottest part of summer. Took me a long time to realize there are really three positions - In, Out, & Mid. When the temp is over 100 I have them set to 'mid' position, not fully in. Really directs the air right on to your legs to help with the heat.