Most undies and essentials are made with synthetic fabrics (plastic!). Instead, Iris uses only one fiber: 100% organic cotton. Our products are always non-toxic, naturally breathable, and exceptionally soft. 

Leading OBGYNs and sexual health experts agree that 100% cotton underwear — especially organic cotton — is the healthiest choice for overall hormone health and fertility.

Synthetic fabrics like polyester, spandex, nylon, and lycra are woven into many undergarments and filled with endocrine-disrupting forever chemicals (PFAS) and microplastics. Cotton, on the other hand, is naturally plastic-free, protecting your most sensitive areas from these toxins. Choosing 100% organic cotton adds an extra layer of protection: it is grown without concerning pesticides or toxic chemicals, which absorb through the skin and can impact hormone balance, reproductive health, and fertility.

Unlike synthetic fabrics, which trap moisture and create an environment where yeast and bacteria thrive, our 100% organic cotton is naturally breathable and moisture-wicking, keeping your skin dry and balanced and reducing the risk of irritation and infection.

Organic cotton is also naturally hypoallergenic and exceptionally soft, making all of our products more comfortable to wear every day.