I am very pleased with the thermal curtain liners that I purchased.  They are not stiff, so they allow the curtain to hang without being bulky.  The price was especially nice, since I could not have made them for the same cost.  I do wish that they were longer; but I purchased the only size you had.  I will purchase more when you have a longer size in stock.

Pros: Thick but not bulky.
Cons: Not long enough.