composition: polyamide 43%, elastane 57%

stretch: W-15%, H-15%,

This bra weight fabric has a finished useable selvedge top and bottom). This means that you actually utilise the selvedge at the bottom (rib band) of your bra, or top (waistband) of your knickers. You can use a fine slim elastic and simply sandwich that in the seam without causing bulk, or lay an elastic behind. This is the sort of fabric now being used to create a very discrete knicker that doesn't show through tight clothing.