treated to stop rot caused by chlorine and sweat and is nice and firm so your legs won’t stretch out of shape. don’t choose the clear type of elastic as it is hard to sew and gives inconsistent results.
start by cutting out your pattern and fabric. when cutting leotard fabrics, be careful that your pins don’t leave marks. test a scrap of fabric and if the pins leave a mark, then use pattern weights or a simple tin from your pantry to hold the pattern down.
always make sure you use really sharp scissors that won’t burr the edges of the fabric when you cut. if you are confident with a 