Our materials
At COS, we work closely with suppliers to handpick materials with intention – every cloth is meticulously selected for its character, yarn count, fibre length and finish to ensure quality and longevity.
Natural and organic fibres are a priority at COS. We pride ourselves on the quality of our cotton – from T-shirts with a clean, compact finish to our pristine poplin shirts, our yarns are carefully considered and fit for purpose. As well as using organic cotton and working with Regenerative Organic Certified®️ Cotton, we’re proud, alongside the H&M Group, to invest in pioneering the innovation Materra®️ Hydroponic Cotton, which is grown with control and care in an indoor environment.
Whether cashmere, wool, cotton or silk, our knitwear is knitted with the super fine fibres for a soft feel with staying power. Merino, cashmere and NATIVA™ Regenerative Wool are knitted individually, then hand linked together to create a luxurious tactility.
Explore our material highlights below.

As part of the H&M Group, we are pleased to announce our commitment to promoting responsible leather manufacturing practices worldwide as a member of the Leather Working Group (LWG). This includes increased due diligence on the issues of deforestation and animal welfare.
leatherworkinggroup.com

Synthetic fabrics such as elastane and polyester often add very functional elements to a garment. For example, adding a small percentage of elastane to cotton jeans will give them a slight stretch – making them less rigid and more comfortable to wear. Or, blending polyamide with wool can help the piece last longer, especially if it’s a product designed to be worn repeatedly, like a winter coat.
We’re aware that blending natural and synthetic fibres makes them harder to break down and recycle into new fabrics. This is something we’re currently exploring with new partners and innovative technologies.