Frequently Asked Questions
Everything you need to know about your Knix experience.
What is the Knix Leakproof technology?
Our patented Leakproof technology features ultra-thin, absorbent layers designed to handle periods, sweat, and light leaks while keeping you dry and comfortable all day.
How do I find my perfect fit?
We recommend using our comprehensive Size Guide found on each product page or booking a Virtual Fitting with one of our experts to ensure the best support and comfort.
What is your return and exchange policy?
We offer a 30-day Wash & Wear Guarantee on your first pair of underwear. For all other items, we accept returns and exchanges on unworn products with tags attached within 30 days of delivery.
How should I care for my Knix products?
For best results, machine wash your items in cold water with mild detergent on a gentle cycle, then lay flat to dry. Avoid bleach, fabric softeners, and ironing.
How long does shipping take?
Standard shipping typically takes 3-7 business days within North America. You will receive a tracking number via email as soon as your order leaves our warehouse.
Are your materials sustainable?
Yes, we are committed to sustainability by using high-quality, durable fabrics like recycled nylon and ensuring our manufacturing processes meet strict environmental standards.