NIXI Body Carla Black Leakproof Knicker — Heavy Absorbency

NIXI Body Carla Black Leakproof Knicker — Heavy Absorbency

Regular price £23.00 Save £-23.00

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Estimated delivery between 22 June - 27 June.

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Heavy period pants that give you genuine, all-day confidence — no matter what your cycle throws at you. The NIXI Body Carla Leakproof Knicker in Heavy absorbency holds up to 20ml (the equivalent of 4 tampons), making it the ultimate choice for heavier periods, endometriosis, light bladder leaks and everything in between. Reusable, beautifully designed and created in collaboration with The Endometriosis Foundation.

Why You'll Feel Confident in the NIXI Body Carla Heavy Knicker

✦ Key Features & Benefits

✧ Heavy absorbency — holds up to 20ml (4 tampons’ worth) for confident, leak-free protection on your heaviest days
✧ Created with The Endometriosis Foundation — designed with input from those who live with endometriosis, with £1 from every pair donated to the charity
✧ VPL-free high-leg design — flattering and discreet under any outfit, from workwear to loungewear
✧ Seamless waistband — ultra-comfortable, even for those living with scars, stomas or sensory sensitivities
✧ Four-layer absorbent gusset — moisture-wicking, odour-neutralising and fully waterproof TPU layer for total peace of mind
✧ Replaces pads & tampons entirely — wear alone on heavy days or alongside a menstrual cup for extra confidence
✧ Reusable & sustainable — washable up to 40°C, designed to last years and reduce your environmental impact

How to Wear the Carla Heavy Knicker with Confidence

The Carla is designed for real life — the days when you need to know you’re protected without thinking about it. Wear it alone on heavy flow days and let the four-layer gusset do the work, or pair with a menstrual cup or tampon on your very heaviest days for an extra layer of reassurance.

The VPL-free, high-leg cut sits smoothly under everything — fitted trousers, bodycon dresses, gym leggings — so no one will ever know you’re wearing period pants. It’s the kind of quiet confidence that changes how you feel about your cycle entirely.

Looking to build a complete period pants wardrobe? Browse our full period pants & period underwear collection, or explore our wider lingerie & underwear edit for everyday essentials. For a lighter flow, explore the NIXI Body range for medium and light absorbency options too.

Sizing, Fit & Care Tips

✦ Sizing

We recommend sizing down in the Carla for the most comfortable, secure fit. Available in sizes 6–20.

UK Size	EU Size	US Size
6	34	2
8	36	4
10	38	6
12	40	8
14	42	10
16	44	12
18	46	14
20	48	16

✦ Fabric Composition

✧ Body: 75% nylon, 25% elastane
✧ Lining: 95% cotton, 5% elastane
✧ Middle layer: 80% polyester, 20% nylon
✧ Waterproof TPU layer

✦ Care Instructions

✧ Rinse in cold water after wear before washing
✧ Machine wash at 30°C or 40°C — do not use fabric conditioner
✧ Do not tumble dry — air dry only (allow extra drying time due to the multi-layer gusset)
✧ With proper care, your Carla knickers will last for years

Frequently Asked Questions

How much do the Carla heavy period pants hold?

The Carla Heavy holds up to 20ml — the equivalent of 4 tampons. This makes them one of the highest-absorbency period pants available, suitable for heavy periods, endometriosis, postpartum flow and light bladder leaks.

Can I wear the Carla knicker if I have endometriosis?

Yes — the Carla was created in direct collaboration with The Endometriosis Foundation. The seamless waistband is specifically designed to be comfortable for those living with endometriosis, scars or stomas, and the heavy absorbency means fewer changes throughout the day.

What size should I order?

NIXI Body recommend sizing down in the Carla for the most comfortable, secure fit. If you’re between sizes, go for the smaller size. The Carla is available in sizes 6–20. If you’re unsure, our UK customer service team is always happy to help — just drop us a message.

Is it worth buying a bundle?

Absolutely. Most women find they need 3–5 pairs to get through their cycle comfortably without daily washing. Our 3-pack and 5-pack bundles offer great value and mean you’ll always have a fresh pair ready.

Ready to Feel Confident Every Day of the Month?

The NIXI Body Carla Heavy Leakproof Knicker is more than just period underwear — it’s a genuine game-changer for anyone who has ever felt let down by their period protection. Designed with care, backed by The Endometriosis Foundation, and built to last. Add your size to your basket today and discover what it feels like to get through your heaviest days with total confidence. Shop the full period pants collection →

Standard UK Delivery: £2.99 (3-5 working days)
Free UK Delivery: On orders over £50 (3-5 working days)
Overseas Shipping: Calculated at checkout based on your location and item weight (typically 7-14 working days; customs fees may apply)
Order Processing: Orders are processed within 1-2 working days
Tracking: Tracking provided for all UK and overseas orders

RETURNS

30-Day Return Policy: Return items within 30 days of receipt, unused, unworn, with tags and original packaging, plus proof of purchase.
How to Return: Email customer-support@ohsoluxe.co.uk with order details to start the process.
Damaged/Incorrect Items: Contact us immediately at customer-support@ohsoluxe.co.uk for resolution.
Non-Returnable Items: Perishable goods, underwear, custom/personalized products, opened personal care items (e.g., perfumes), hazardous materials, sale items, or gift cards.
EU 14-Day Cooling-Off: EU customers can return within 14 days for any reason, provided items are unused, unopened, with tags and packaging.
Refunds: Processed within 10 business days to original payment method after approval. Contact us if delayed beyond 15 business days.
Exchanges: Not offered directly; return the item and place a new order.

NEED HELP?

Contact Us: Use our contact form, website chat, or WhatsApp (+44 7421 511880).
Email: Customer enquiries: customer-support@ohsoluxe.co.uk | General enquiries: info@ohsoluxe.co.uk
Response Time: Reply within 48 hours.
Customer Service Hours: Mon-Fri, 9am-8pm UK GMT.