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warm sweater day // warme truien dag

2nd November 2015
Warmetruidag copy

Warm Sweater Day, or Warmetruiendag, is a global initiative started in The Netherlands to campaign for real action against climate change by reducing greenhouse gas emissions. By showing how fashionable and comfortable the sustainable way of life it, the aim is to make saving energy the new normal.

Last year in Febuary 2015, 200,000 people joined the action in the Netherlands and the campaign had a overwhelming media coverage of 30 million. Warmetruiendag won the National Energy Globe Award of the Energy Globe Foundation, and is now also organised in Belgium (dikke truiendag), Canada (by WWF) and Germany and Austria (Pullitag).

It couldn’t be any simpler to make a real difference. On Friday 5th February 2016 people at school, home and in the office are encouraged to turn down the heating by one or two degrees and show, by simply wearing a sweater, that they care for the environment. Each degree lower saves 6% energy and therefore CO2 emissions and heating costs. The sweater is therefore a symbol of what people can do themselves to reduce the greenhouse gas emissions that contribute to climate change, with the very accessible concepts of ‘do it yourself’ and ‘working together’.

Especially for Warm Sweater Day a sweater is designed that you can knit yourself (“de Trui Van 2016”). The pattern is available for free on the website ( Together with fashion designers, product designers and scientists, Warm Sweater Day looks for ways to keep yourself warm (personal thermoregulation), and thus reduce the emission of greenhouse gases considerably. The slogan here is: use the power of fashion for saving energy!

I was fortunate enough to meet the inspiring Anne-Marie Pronk, producer of the knitting project for Warm Sweater Day at a trade show in Cologne earlier this year and am just thrilled that she and innovative Dutch knitwear designer Carolien Evers ( have chosen to use maxi wool for the 2016 sweater design. For the design Carolien looked carefully at nature and the construction of bees inspired her to use a voluminous bee stitch. Wool is naturally soft, comfortable and sustainable making it the ultimate fibre to knit your own Warm Sweater Day sweater, wool is a natural insulator and will therefore keep you warm, and allow your skin to breathe.

So pick up your needles, a few hanks of wool, download the pattern for free and knit your way to a greener future for us all.

Warm Sweater Day 5th February 2016

For more information: #ikbreimee #warmetruiendag
Photo credits: Foto: Eva Broekema, Model: Tina @EVD Agency, Make-up artist: Niels Jansen, Ontwerp trui: Carolien Evers, Bedtime for Bonzo, Wol: Erika Knight, Rok: Marcha Hüskes via Coming Soon Arnhem. Productie: Klimaatzuster, In opdracht van Greenchoice Warmetruiendag

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