Are Female Engineering's period panties treated with anything?

Up until now, we have used an anti-bacterial and odour-preventing treatment in the absorbent gusset called Agion Active XL, that contains the biocidal substances silver copper zeolite and silver zeolite. Biocidal substances are strictly regulated in EU law and the substances used are approved for use in textile products. This treatment has been one of the best available, but we have also been working together with industry leading partners on finding an alternative solution. From 2025, we have replaced this treatment with a treatment called HEIQ Fresh MNT 01, that controls the development of odour in the panties and is free from biocidal substances.

All our period panties are certified by OEKO-TEX®, which means that the products have been evaluated for the content of substances harmful to health. Both the ones with the previous anti-odour treatment and the ones with the new odour control treatment, are equally safe to use.

Why do we use treatments in the absorbent gusset? 
Surveys and conversations with our customers show that fear of unwanted odour is one of the biggest concerns when it comes to trying period panties. To address this, we’ve included an odour treatment. All our period panties, both the ones with the previous anti-odour treatment and the ones with the new odour control treatment, are equally safe to use.