Sini High-Waisted Leggings

Sini High-Waisted Leggings


Our Sini High-Waisted Leggings are a part of our new activewear collection called North. This collection is inspired by the rough but resistant nature we have here in the north where Lilja the Label is from. We wanted to celebrate the gorgeous autumn hues Northern Europe offers when seasons change. Sini, the name we gave the midnight blue variation of of these leggings, is a Finnish word for the colour blue. This reminds us of the blue hour, a period of twilight where the sun is well below the horizon and the indirect sunlight takes a blue hue. This hue is especially dominant in winter when the northern parts of Europe get less sunlight and the sun stays below the horizon for longer.

These leggings are made from recycled plastic waste collected from our oceans (Econyl) – and then recreated into these gorgeous workout leggings! These leggings offer a high waistline for maximal support and coverage, flattering v-cut and full ankle length. Our activewear items are perfect for all indoor and outdoor activities, whether your thing is running, gym, yoga or just lounging! Our supportive 4-way stretchy fabric offers support and compression where needed without sacrificing comfort.


  • Material 78% recycled PA, 22% elastane (Econyl)
  • Full ankle length
  • High waistline
  • Compressive four-way stretch fabric
  • SPF 50+
  • Made ethically and sweat-shop free in Bali – happy to tell you more!
  • Fiia is 163cm tall and wears size M, Vivi is 182cm and wears size S

Love the look of our ethically made activewear? We’ve gathered some more useful information below!


We know that sizing can be tricky! If you need any help, do not hesitate to get in contact.

A lot of sizing is up to individual preference: you can think of whether you like your activewear to be more tight-fitting, or if you prefer a softer, looser fit. If you prefer a snug fit, shop your usual size. If you prefer a looser fit, you can choose a size up. Please note, though, that activewear will always feel snug when worn for the first time, and the fabric will always get a tad softer after being worn a couple of times. Because of this, we recommend a snug fit so that your new pieces offer you the best possible fit. This is of course up to your personal preference.  If you are in between sizes, you could probably wear both – the smaller one will be snug and the larger one more loose-fitting.

Quick sizing guide:

XS: EU 34 / UK/AU 6 / US 2
S: EU 36 / UK/AU 8 / US 4
M: EU 38 / UK/AU 10 / US 6
L: EU 40 / UK/AU 12 / US 8
XL: EU 42 / UK/AU 14 / US 10

You can find our detailed size charts here.


The fabric used in our activewear collection ‘North’ is Econyl, a nylon yarn regenerated from discarded waste plastics, such as fishing nets and plastic bottles collected from our oceans. These post-consumer waste plastics are given a new life in form of our activewear through a process that involves breaking down the nylon polymer into monomers, then regenerating the nylon into a new yarn. The breakdown process is done with only temperature and steam, without the use of harmful chemical agents, in a renewable energy driven process. Reusing nylon to make Econyl reduces the environmental impact of nylon by 80% compared with the material produced from crude oil. Read more about the process via the fabric manufacturer’s website.


  • You can machine wash your activewear at 40*c
  • Do not tumble dry – it weakens the stretchy fabric
  • Dry in shade to avoid fading
  • Wash with similar colours to avoid discolouration
  • Watch out for rough surfaces, zippers, bra clasps and buttons

You can find our product care guide here.


We absolutely love every single one of the items we have created and we hope you feel the same! If for any reason you don’t, don’t worry! We have a full 14-day exchange and return policy counted from the day you receive your order. You can return your entire order or any part of it for a full refund, shipping cost excluded. We also offer exchanges for incorrect sizes or for any other reason. Please refer to our Returns & Exchanges page to start your return.

If you have any questions about this product, please do not hesitate to get in contact – you can reach us by emailing x