Winter Glove Experts... What is this tab for?

[GRFMotorsports]

I have this pair of older winter gloved but what is the ridge on the back of the left thumb for?

 

[Slojack]

Little squeegee to wipe snow off your goggles.

 

[TheStig]

Could it be like a windshield wiper?

 

[Broccoli]

Could it be like a windshield wiper?

Yes.

 

[GRFMotorsports]

Thank you one and all. Thats all I could come up with but I am not a winter loving guy so I wasnt sure.