Bra Strap Elastic - Black – Sewing Supply Depot

82% Nylon 18% Spandex Elastic  - Shiny satin center  - Suitable for garments such as lingerie, bras and more. 

1/2 PLUSH BACK BRA STRAP ELASTIC - by the metre - – The Makehouse Co-op

Lingerie has become my favourite to sew : r/sewing

China Bra Elastic, Bra Elastic Wholesale, Manufacturers, Price

1/2 PLUSH BACK BRA STRAP ELASTIC - by the metre - – The Makehouse Co-op

Knitted elastic available in black and white.

Soft Knit Elastic (By the Yard)

Bra Strap Elastic - Black – Sewing Supply Depot

Satin Bra Strap Elastic - Black – Fabricville

Strap Elastic – Allied Trimmings

Supply list for the Willowdale Bra

1/2 PLUSH BACK BRA STRAP ELASTIC - by the metre - – The Makehouse Co-op

How To Choose Sewing Elastics, Sewing Elastic Guide

Plush Back Picot Edge Elastic - Black, white and ivory - Sew Projects