$243.00 Regular price
Unit price
Midnight Matter
This garment grows through sizes, effectively bringing each size to
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London designed, built in Portugal
London designed, built in Portugal
Free repairs warranty
Free repairs warranty
30 day returns
30 day returns

Petit Pli’s unisex Beta Bottoms have a unique construction that expands and contracts to your body, adapting as you do and covering you for life. Due to the meticulously engineered construction they can even be used during maternity, with bi-directional stretch allowing them to expand around the bump and return back to their original shape after the baby arrives. The trousers come in three leg lengths - short, regular and long, and can be matched with our Inner and Outer Gilet.

  • 3 lengths - short, medium and long
  • High waisted for comfort
  • Soft and breathable fabric
  • Pockets for storage
  • Machine washable at 30 degrees
  • Designed in London and ethically made in Portugal

FIT: Elastic band at waist for adjustable fit
FABRIC: Soft and comfortable to be worn next to the skin
LABELS: Transfer labels, no itchy label syndrome
VERSATILITY: Breathable and lightweight


A cold, gentle machine wash will take the best care of Petit Pli’s fabric and the planet. For more information check the product care page.

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★ ★ ★ ★ ★ - They are excellent. Stretchy, made of good material and most importantly look great! I've been wearing these with (kitten) heel or pretty flats for work in the City and a shirt and blazer.

Rachel G.


Zero waste packaging inspired by our origami designs and a fun activity for your LittleHuman.

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Our patented designs are only available direct from Petit Pli. So, we ship to most of the globe.

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A cold, gentle machine cycle will take the best care of your Petit Pli garment. Learn more.

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Customer Reviews

Based on 9 reviews
Almost perfect…. Almost.

They’re really cool to look at are extremely well made and I’ve had many compliments while wearing them. They’re also really comfortable to wear and great for regulating body heat.

Functionally though there are a few misses. There are no back pockets and the front pockets are awkwardly positioned so that they always swing the wrong way, it’s hard to put your hands in them (because of the angle of the cutouts) and they’re not deep enough for me to feel like my phone or wallet won’t fall out.

I’d suggest deeper pockets and some zips (or something similar) and a repositioning of the pocket holes to make them easier to access as well as a reshape so that the pockets inside fall the right way.

The other thing is the length. I hadn’t quite factored in how short cut they would be (which means I’m having to wear them lower on my waist) this makes the pocket situation worse and also can look a little parachute pant esque.

It’s hard to know which way round they should be worn. Having the dragon textured fabric at the front draws attention to the crotch area which is… an interesting idea. I get that it’s meant to be worn higher but it’s still an interesting choice of placement.

Overall they’re good, on the cusp of great. My main qualms are the pockets and the length. Everything else is perfect from the packaging to the material to the look.

Rachel Green

My only slight is I wish I found these earlier in my pregnancy! I am 173 / 5'7" and bought the long version. They are excellent. Stretchy, made of good material and most importantly look great! I've been wearing these with (kitten) heel or pretty flats for work in the City and a shirt and blazer. I've only just recently washed them too with a non bio powder detergent - no fabric softener and just hung them up to air dry and they've fared well! Lasted all the way to the end. Keen to see how they operate post bump! Please, please make these in other staple colours: black and tan at the very least, so we can be stylish, ecological and practical all year!

Susie Bradley

Great comfy quirky trousers that keep their shape & look great!

Super nice!

I was very pleased with my trousers. I had a slight moment of panic when I thought they did not have pockets - but they do!! Hurrah!

i've received a lot of compliments on them too.

coolest pair of pants I own. 🚀

such a believer in the logos and ethos of petit pli. the pants are stylish, fit perfectly, are supremely flexible, and most importantly, are designed with intention.

can't wait to get them in every color.