The Very Good Bra
About as uncompromising as it gets: the brand's stated rule is that a truly sustainable garment "can't contain even 1% spandex or polyester," and it holds to that - stretch comes from natural rubber knitted into cotton, cups are TENCEL over a cotton liner, and the only non-fiber parts are cadmium- and nickel-free metal hooks. The whole garment is designed to compost. The one caveat for readers is that natural rubber is a latex, so it is not suitable for a latex allergy (where Cottonique's latex-free cotton is the alternative).
How clear are their specs?
Publishes a component-by-component material and origin list for each product - fiber, liner, elastic, thread, and hardware all named, with countries.
Products we list
The Very Good Undies (Boyleg)
100% TENCEL body with a natural-rubber-and-cotton waistband and no leg elastic - zero synthetic fiber, fully compostable. Natural rubber means not latex-allergy safe.
V for Victory Bra
A genuinely plastic-free bra - TENCEL cups, cotton liner, natural-rubber/cotton band and straps, metal-only hardware. No elastane, no plastic sliders. Optional shaping pads are polyester (removable). (Natural rubber = latex.)