Carhartt Men's W.P. Waterproof Insulated Mittens

Is the lining open inside as a "true" mitten - or does the lining separate the fingers?

Has anyone tried these gloves with double rag wool mittens inside as liners? Is there room for them?

Do these mittens have finger dividers inside?

Is the lining like fleece or is it more like a rip-stop nylon?