There are so many jobs for clear elastic in lingerie sewing. You can add it at the top of the cup under a galloon edge or along the waistband or leg openings of lace panties. You can use it to ruche the center of a bralette or the back of undies. You can use it as a supplemental elastic behind a soft lace to make sure that there is enough elasticity for the job you need to have done. 

Here's a helpful  to get you started sewing with clear elastic.

Please order by the yard.