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! 


Shipping & Returns

Free shipping on all AU orders +$100 and all international orders +$200.

Flat rate shipping of $7.00 for orders less than $100.

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

Try risk free for 30 days*

As a first-time customer, you can try one pair of undies for 30 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.


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. 

Customer Reviews

Based on 9 reviews
Sarah Duncan
Lacy Bum

So comfortable and look great - really happy with them.


I love the lacy bum! They’re exactly what I wanted. They’re so stretchy and comfy, and the lace makes less VPL. Much nicer than other period undies I own. I bought 3 mediums to use with a cup on my heaviest days so I won’t need to worry about leakage when I’m busy at work. Seems very absorbent and reliable. I’m so glad I got them :)

Excellent undies

These undies are comfy, fit perfectly and are a really flattering shape. I’ve tried a range of period undies but Wunderthungs are now my go to, I have a pair in every style!

My fav's

These undies are so comfy and I love the lace - you wouldn't know they were period undies.
I'm not worried about leaking at all they are very absorbent

Kim Meredith
Lacy Wonder

I feel confident during my periods, stepping out into a busy day wearing The Lacy Bum! My favorite undies for a discreet look, yet total protection.