Frequently Asked Questions
Everything you need to know about our sustainable period apparel.
How do Thinx period undies actually work?
Our underwear features a patented four-layer technology that wicks away moisture, controls odors, absorbs liquid, and provides a leak-resistant barrier to keep you dry and comfortable.
How do I care for my Thinx garments?
For best results, rinse them in cold water immediately after use, then machine wash on a cold cycle without fabric softener or bleach. Always hang them to dry to preserve the integrity of the tech.
What is your return and exchange policy?
We offer a 60-day 'Fresh Start' guarantee. If you are not satisfied with your first pair, you can return or exchange them within 60 days of purchase, even if they have been worn and washed.
How long does shipping take?
Standard shipping typically takes 5-7 business days within the United States. International shipping times vary by location but generally range from 10-15 business days.
Are your products safe and free from harmful chemicals?
Yes, all our products are rigorously tested for safety. We are OEKO-TEX certified, ensuring our fabrics are free from harmful substances and safe for skin contact.
How do I find the right size?
We recommend checking our comprehensive Size Guide located on each product page. Our sizing is designed to be true-to-size, similar to standard high-quality lingerie brands.