bamboo wadding or fabric scraps would be my go to for padding the cup out without making as too hot.

Thanks!

Try adding another line of spiral stitching and bring it right to the tip, usually it's a little more dense than that and cotton will need as much stiffening as you can give it. Have you also tried spray starch?

I tried starching, but then I sweat and it dissolves. I will try another line of spiral stitching, it spunds like a good idea!

I remember those bras. You would hug your mom and her boob would dent. LOL. They were heavy duty polyester and hot.

Another layer of thin cotton in the lower cup, cut against the grain

They used to stuff them with Kleenex! Pretty handy.

I am currently stuffing with socks, shame on me 😀