Women's Sabrina Lace Scoop Bralette

I wanted a pretty cotton bralette for hot days and sleeping. I looked for material source, didn't notice anything, and assumed it was cotton as the brand is "cottonon". Material: polyamide, elastane, polyurethane. The bralette itself is very narrow across the breasts providing little support. Where the lace starts, all support ends. The bra holds maybe one-quarter to one-third of the breast. Trying it on, I felt like I was falling out. I'm petite and usually buy xs and s. I bought m for my cup size. The M was too big around my rib cage but the s would probably be too small. I'd rather buy cotton bralettes more frequently rather than synthetic, non recyclable fabric (landfill plastic poison). If this were made with cotton and had 15-20% more material in front, I would happily buy many of these EVERY year.