Bra Strap Elastic - Black – Sewing Supply Depot

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

3/4 FIRM BRA BAND ELASTIC PLUSH BACK – The Makehouse Co-op

Bra Straps, Replacement Bra Straps & Bra Strap Elastic - WAWAK Sewing Supplies

YYCRAFT 3/8 Inch 10mm Bra Strap Elastic Band Trim Elastic Ribbon Craft Sewing(20 Yards,Black)

Where can I find affordable supplies for lingerie making? : r/sewing

Elastic – Sewing Supply Depot

Elastic Woven – Discovery Fabrics

Strap Elastic – Allied Trimmings

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3 Pack Non-slip Women's Elastic Bra Strap Holder Non-slip Bra Straps Elastic Adjustable Bra Strap Holder with 12 Bra Strap Clips

Supply list for the Willowdale Bra

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

Braided Elastic is a lightweight elastic that narrows when stretched. Known for it's strength and longevity even in the narrowest widths. Great for

Braided Elastic (by the yard)

WAWAK – Finest Sewing Supplies l Since 1907