The Maternity Treggings


Size guide

In stock

Meet the people that make this for you.

Fits true to size, we suggest ordering your normal size.

Our bestselling treggings combine the look of a trouser with the comfort of a legging. Crafted in our heavyweight ponte fabric that sculpts and flatters, making them an ultimate everyday staple. For work or weekends, they can be styled with anything.

  • You can wear this during pregnancy and beyond
  • Crafted in premium Ponte that sculpts and flatters
  • Ideal for work with flats and a longline shirt and blazer
  • Elasticated waistband feature

Meet the people that make this for you. Watch the video.

    • 70% Viscose, 25% Polyamide, 5% Elastane
    • Machine Wash - 30°
    • Product Code: TR065
    • Inside leg - 84cm (33")
    • For more sizing information please click the 'Sizing' link under the size selection box
Delivery & Returns



      • Standard Shipping 5-7 business days - FREE* for US orders over $99 (normally $9.95)
      • We've covered all applicable duties in the selling price when you make a purchase.
      • International Shipping to over 120 countries available


To find out more about all shipping information and timescales, click here.


Naturally we hope you’ll LOVE your purchase, but it’s alright to change your mind. We offer full returns on all unworn items returned with tags.

View the complete Returns Policy here.

Reviews Average Rating 41 Reviews on
9th June 2018

So comfy! Perfect fit, lovely fabric and thick.

24th August 2017

These fit like a dream and are wonderful

31st May 2017

I have to return them: too big for me!

7th May 2017

Love love love theses. A little long for a short person (I'm 5ft 4) but they turn up well so they are entirely wearable. Super soft and good material so they're not see though. I'm trying to exhibit self restraint and not buy them in lots of other colours!

4th April 2017

Far too long (and I'm not that short) and too wide on the legs. The material was also really thick and not that comfortable. Had to send them back :(

13th March 2017

Quality is nice and the leggings are made from a thicker material which is great!

8th March 2017

Oh my goodness what a lifesaver. I want five pairs so I never wear anything else. The fabric is really comfortable and high quality, and the length is nice (it gathers at the ankle in a flattering way). Looks great with a loose shirt or a more fitted top.

21st June 2016

Perfect for work or just out on weekend.

31st May 2016

Bit too tight around the calf

23rd May 2016

Comfortable around the bump but a tiny bit long - easily fixed by folding up

26th April 2016

All-round comfortable and good to wear. However, I'm 5'10", 180 lbs and these fit very close to the skin, so much so that they are like tights/tight leggings; definitely not the suit item I had hoped for, although they would probably work in a smaller person.The waistband is very comfortable, they stay in place well, and the material seems sturdy. Good for wearing just about everywhere where leggings are appropriate. Nice and cool for summer because they don't go up over the belly.It would be nice if they were available in a larger size, and if IO made underbump pants which basically have the same waistband, but a leg cut more like a bootcut jean or yoga pant as well as a wide leg office pant.

26th April 2016

I love these. I wore them for the first time today and I'll happily live in them forevermore! Great fit, super comfy and really stylish too

14th April 2016


5th April 2016

Wonderful quality and nice material. I am short, but even so these seem extremely long, so I have to wear them a bit more bunched up at the ankles than I hoped, or hem them shorter.

8th March 2016

These are great. Thick enough to be work appropriate and stylish enough to wear out at night.

28th February 2016

I'm only 5ft 2 and the treggings were too long for me - I've tucked up the bottoms but the effect is slightly spoiled. My fault for being so short!

6th February 2016

Long, lean legging machines. These look great and appear professional even though they are leggings. No pilling either.

1st February 2016

Not at all see through -perfect

20th January 2016

I have very skinny legs and they are slightly baggy but very comfy.

4th January 2016

Very warm and stylish

29th December 2015

Really nice treggings. Smart and stylish for work. Looks good with heels and flats.

29th December 2015

Didn't like how it fit. Too long.

29th December 2015

Sit under the bump and are very comfortable. They are quite long which for me is excellent.

2nd December 2015

Very comfortable and looks like a pair of pants

30th September 2015

Comfiest pair of maternity trousers I've tried but the colour was too bright for me.

28th September 2015

I have been wearing these treggings most of the time since they arrived. I did need to have them taken up but this is the same with most trousers. Warmer for the cooler weather too.

10th September 2015

very comfort and stylish

27th August 2015

Not fitting well on me. Nice fabric

25th August 2015

Wore the product to work with Libby Tunic. Would recommend to a friend.

20th August 2015

I'm 5ft8 and the legs are very long for me-need to be turned up.

13th August 2015

These are really comfortable! Great fabric and fit. I wish there wasn't a seam on the leg, but I can live with it. Would prefer a vertical seam at the center of the leg instead.

7th August 2015

Nice pair of treggings. Normally a 12 and bought size 3, but these were too big so unfortunately had to be returned.

7th August 2015

Nice pair of treggings. Normally a 12 and bought size 3, but these were too big.

17th February 2015

Most comfortable treggings I have ever worn. I will be living in these!

19th December 2013

Very comfortable, with more stylish structure than the traditional legging. Low waste fit can be suboptimal during the third trimester.

Strangely long!
19th May 2013

These trousers are good quality, and should be perfect, but as others have said, they have a weird fit. I'm fairly tall (5'8) with quite long legs, and these are miles too long. They also got really baggy around the knees and bum after only one wear, which is very frustrating. I can't return them because I have worn them a couple of times, but I'm disappointed. The quality of IO clothing is brilliant, but these have been a bit of a let down.

Best purchase ever
8th March 2013

Ordered treggins 2 days before and now I have them on me, they were delivered to other country for less then 1 day!!! Quality is perfect, I enjoying it in my pregnancy and am sure that will use them after also. Length was extra important for me as I'm 186 cm long but they suit perfect! Thank you!!!

does just what they say on the tin
28th December 2012

Never owned a pair of treggings before - I hate the very word. But fact is I'm sick of maternity jeans that keep falling down (and sometimes jeans aren't smart enough anyway). These fit great, wash well, don't sag or bag, don't fall down, look good with most things.

6th December 2012

Very nice, thick quality, great for winter. Perfect teamed with boots and a sweater. Main criticism is they fall down all the time - I'm having to pull them up every 5 seconds! Not the most attractive look.

Nice but not perfect
29th October 2012

These leggings are of superb quality!!! The fabric is very thick. They fit like a glove and yet stretchy. I would have loved to have kept them, but I am sending them back because I am realizing that I prefer leggings with the elastic band at the top to accommodate a growing belly. This one fits below the belly because its a bit too tight to cover it. While I thought I like this style since I don't like anything over my belly, below the belly pants are not as comfortable because they cut into my pelvic area. So I am sending these back. I highly recommend them though if you don't mind the below the belly aspect. The leggings are slightly long, but I don't mind gathering them above my knee, they look very good and stylish, the fabric is very comfortable and are of the high quality that I have come to expect from IO. The only issue is that I don't see what makes it like Jodhpurs, these treggings are black so they look like any other pair of leggings.

I love these!
15th October 2012

I can see that I'll be wearing these treggings throughout my pregnancy, and most likely afterwards too. They are nice and thick, perfect for New York, and they look stylish when teamed with a long length sweater or coat and boots. I wore them recently on a plane and they made the flight much more comfortable. I'm not sure they'll fir right through my third trimester, but here's hoping.

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