I have a question about leos. I have a friend who is wanting to start a business making them, and she is wanting to fully line all her leos. None of my DD's leos are lined at all, and since I have yet to see even one company who puts a lining in them, I'm thinking there must be a reason for that. My concerns are that 1) The extra layer will make it too hot, and 2) That the two fabrics might slide against each other and throw the girls off by somehow making them slip a little. She is insistent that the reason companies don't line them is most likely for cost cutting reasons, but I thought I would ask here.