The problem is that it won't stretch and you won't be able to breathe and/or it will just fall down. Real corsets push breasts upward or do nothing to them - and many corsets do little or nothing to the rib cage - even in tight-lacing the upper rib cage is not being pressed in.
Elastic is used because it's a material that stretches so that you can breathe, but not TOO much.
Disclaimer : This post written by a Grumpy Old Man
Actually in the pipes:
- Remaking Ser Loras doublet.
- Luke Skywalker, A New Hope
- Wind Waker starter costume in swim material
Eventually: Paul from Dune, Faramir, Harry Sullivan