SPEED S size. It had a double layer, but the inner fabric was thinned, so it has been cleanly removed. (Practice swimsuit, it had a double layer, so it's now the thickness of a general swimsuit, and it's not see-through.) Please understand that there are print cracks and stains on the back before purchasing. The name is written on the back of the tag, so it will be cut off before shipping. *Price reduction is not possible, but there is a combined shipping discount. Please comment if you'd like it.