Mom wanted a "warm" pair of mittens - where do you start looking?  Checking on Amazon, these caught my eye because they are genuine deerskin leather, lined (including individual finger lining, which is nice), and reasonably priced.  I don't know if the sherpa lining is real or faux sheepskin, but I can tell you that whatever the lining is, combined with the leather exterior, makes these mittens nice and cozy.  I would recommend sizing up, as the product description recommends - while these are probably going to stretch out a bit, they definitely run a little small.  What can I say - I liked the ones I got for Mom so much I went back that very day and ordered a pair for myself!