The Lacy Bum



Simple in the front. A lacy party in the back.
Great for every flow, every day of the week.  

Flow: Medium = 15ml / 3 regular tampons or Heavy = 20ml / 4 regular tampons.

Medium: useful for your entire period if you tend to flow light, or suitable from day 3 onwards if you flow on the heavier side. 

Heavy: if you have heavier flow, this is your go to! 


Try risk free for 60 days*

As a first-time customer, you can try one pair of undies for 60 days risk-free. If you don’t like how they function, we will happily give you your money back (minus the cost of shipping).

Unfortunately, garments that have been worn can no longer be returned due to sanitary reasons. And you know, the market for second-hand underwear isn't all that flash!

So, we will require a brief explanation of the reason for your request.  The trial applies to one worn garment only.

No further refunds, credits or exchanges can be given on any additional worn or washed underpants.

Out of stock items

Current waiting time for out of stock items: less than 2 weeks (14/11/23).

Shipment of your in-stock items may be delayed until your pre-order item is ready for shipping. To ensure faster delivery of your in-stock items, we recommend making two separate orders - one for your pre-order items and one for your in-stock items.


Formulated with organic cotton and nylon made from recovered ocean plastics, these underpants whisk moisture away from your body (and plastics away from the turtles!), keeping you dry and "good karma'd" all period long.


Find our size guide here

*Disclaimer: The Sleep Tight run a little smaller than our other sizes, if you are in between sizes we would recommend choosing the larger option. Should you have any questions, please email us on and our team will be happy to assist further. 

Shipping & Returns

Flat rate shipping on all AU orders $7.95

International shipping to New Zealand $15.00

United Kingdom and USA $25.00

All in stock items are dispatched within 1-3 business days (excluding weekends, public holidays and busy sale periods) and deliver in 3-8 business days. 

Our undies are delivered to you by Sendle – Australia’s first 100% carbon neutral delivery service.

You may return all other unworn garments in original unopened packaging for a credit or refund within 30 days of your purchase. View our full return policy here

Customer Reviews

Based on 37 reviews

Absolutely cute and not just for period underwear. They're really good

Comfortable and stylish

Feels great on the skin and is very comfortable to wear. Has good coverage, very happy with it. Love the design

Belinda Foehn
Lovely & Comfy

I have been wearing period briefs for a few years now, but wanted to try another brand due to visible panty lines. Well these knickers are very comfy, soft & little but sexy & minimal visible panty line. Very happy & I've just ordered 5 more pairs. Another colour like navy would be great to add too. 😊

Wunderfully surprised

I was sceptical that these cute looking undies would help my confidence. After surgery I started having bladder leaks. These undies are the answer to my prayers. I love them! 😍

Rachael Lawry
Love them

They are very comfortable to wear and I love the lace design and I can wear them all day and don’t need to be worried about any leakage. Great product!! Will continue to buy from this brand!