Any ladies here use the xerotherm undergarments? If so, how well does the "XS" and "S" unisex sizing work and how well do they translate to street sizes? They seem to be cut for men more than women - e.g., if it fits in the chest it won't fit in the hip (this is what happened when I tried the core warmer vest - got the smallest size "S", and it was big in the chest but I had a lot of trouble getting to to stay down on my hips).