Written by Megan Marshall · Reviewed by the JulieMay product & garment-tech team.
Your bra sits against some of the most sensitive skin on your body, all day, every day — so the material it's made from matters more than almost any other feature. The right fabric keeps you cool, dry and comfortable; the wrong one can trap heat and moisture, rub, and trigger itching or rashes. Here's what to look for, and which materials are best for sensitive skin.
What makes a bra material good?
Four things decide how a fabric feels over a long day:
- Breathability — does it let heat and moisture escape, or trap them against the skin?
- Moisture-wicking — does it move sweat away to keep you dry?
- Softness and friction — is it smooth against the skin, or does it rub?
- Irritation risk — does it contain dyes, finishes, latex or metals that sensitive skin can react to?
The best materials for sensitive skin
Organic cotton
Cotton is breathable, soft and absorbs moisture well, with a low friction and irritation risk — which is why dermatology sources often recommend cotton clothing for eczema-prone skin. Organic Pima cotton takes this further: a longer staple makes it stronger, softer and less prone to pilling, and organic growing avoids the pesticide and chemical residues found in conventional cotton.
Pure silk
Silk is exceptionally smooth, light and cool, and handles light moisture well, so it is especially comfortable in friction- or sweat-prone areas. It is a natural protein fibre that is naturally hypoallergenic and antibacterial — which is why JulieMay lines every bra cup and brief gusset in 100% pure silk.
Materials to be cautious with
Synthetic-heavy fabrics like polyester, nylon and elastane add stretch and shape but can trap heat and moisture against the skin, which some sensitive-skin wearers find less comfortable and which can worsen conditions like eczema and psoriasis. Watch out, too, for exposed elastics, harsh dyes and nickel in hooks and underwires — common triggers for contact allergies.
It is not just the fibre — construction matters too
Even a great fabric can irritate if it is badly built. Look for cotton-wrapped straps and underbands (no exposed elastic), smooth enclosed seams, tag-free designs, and flexible or wrapped underwires. JulieMay wraps straps and bands in double-layered Pima cotton and uses tagless printing for exactly this reason.
How to choose
If you have sensitive or reactive skin, prioritise breathable natural fibres — organic cotton with a silk lining — and avoid synthetics, latex and nickel. If you are between styles or sizes, our bra fitting room can help you find the right fit, and our allergy-friendly range is dermatologist-approved and accredited by Allergy UK.
Frequently asked questions
What is the best bra fabric for sensitive skin?
Breathable natural fibres — organic cotton with a pure silk lining — are usually best. They cool the skin, wick moisture and have a low irritation risk, unlike synthetic polyester or nylon.
Is cotton or silk better for a bra?
They work best together. Organic cotton gives breathability and structure, while a silk lining adds smoothness and moisture control where the bra touches the most sensitive skin.
Which bra materials should I avoid if I have allergies?
Avoid polyester, nylon and elastane next to the skin, plus exposed elastics, harsh dyes, latex and nickel hardware, all of which can trigger reactions.
Does a more expensive bra mean better material?
Not necessarily — look at the fibre and construction, not the price. A well-made organic cotton and silk bra with covered elastic and no nickel will usually be kinder to your skin than a pricier synthetic one.
Last updated: June 2026.
