FitKnicks is underwear designed specifically for women who train and wear activewear. We focus on the things that usually ruin a workout (or your confidence): visible panty lines (VPL), rolling and bunching, wedgies, and light stress leaks.

FitKnicks are made for active women of all kinds, including strength athletes, athleisure lovers, and postpartum mums getting back into training.

Seamless (not leakproof): Made to disappear under tights with full coverage, stay-put fit, and a silver ion treated lining for freshness support.

Leakproof: Made to look seamless under gym gear, plus leak support for light stress leaks.

No, they are not a g-string/thong. FitKnicks are designed to sit smoothly under activewear to minimise VPL and awkward lines, while staying put through movement so you are not constantly adjusting mid-session.

SUI is when small leaks happen under pressure or impact, like heavy lifting, bracing, jumping, coughing, laughing, or high intensity training. It is common and nothing to be embarrassed about. Our leakproof pairs are designed for women who experience light stress leaks and want peace of mind while training.

Our leakproof pairs are designed to hold around 20 to 25 ml. Most gym-related stress leaks are often in the 5 to 15 ml range, so this is designed to provide peace of mind without bulky padding.

They may not be suitable for:

• bench days or workouts where you are lying on your back a lot, as the gusset does not extend up the back
• comp days or maxing out if you experience heavy leakage, where volume or speed may exceed capacity
• very early return to training postpartum, when you are still learning your triggers and limits

FitKnicks is designed primarily for gym-related leaks and SUI, rather than periods. Some customers choose to wear them on a light day, but they are not intended/tested as period-first underwear (eg. for discolouration).

Seamless underwear uses ultra-fine fibres and bonded construction, so proper care matters:

• Wash cool, max 30°C, on a delicate cycle
• Use a gentle, pH-neutral detergent
• Wash in a mesh wash bag if possible
• Air dry only, away from heat and direct sunlight
• Do not use fabric softener, bleach, or dryer sheets
• Do not tumble dry, iron, or dry clean

Heat, harsh chemicals, and rough washing can damage seamless bonding and elastic fibres, sometimes permanently. Following the care instructions helps your FitKnicks last longer and protects you if you need to make a faulty item claim.

You can, but we generally do not recommend it. FitKnicks is designed primarily for training and sweaty sessions using performance, moisture-wicking materials.

We process orders within 1 business day and shipping times vary depending on your location. Typically, orders within the AU take 4-9 business days to arrive via standard shipping and 2-4 with express.

Yes! We'll send you a shipping confirmation email with a tracking number so you can track your order.

Within Australia, we offer $10 standard shipping and $15 express shipping via Australia Post. Orders over $100 AUD receive free express shipping within Australia.

For hygiene reasons, we can only accept change-of-mind returns on underwear that is completely unopened, in original packaging, returned within 14 days of delivery. Returns and exchanges can be started via our self-serve returns portal.

To initiate a return or exchange, simply log in to your account, go to the Order History section, and select the item you wish to return or exchange. Follow the provided instructions, and our team will guide you through the process.

No, if you change your mind and want to refund or exchange. In this case, return postage applies unless you choose to self-post. For refunds, return postage is deducted from your refund total. For exchanges, return postage is paid during the exchange process and the replacement ships at no extra charge once approved.

In the instance of faulty products where we need to assess the item, we will provide you a return shipping label.

If a product is genuinely faulty, we're here to help. The first step is to fill out our fault form so that we can assess appropriately.

PLEASE CLICK HERE TO ACCESS IT.