Our Fabrics



Natural fibres have been at the core of SIR. since inception. As we continue to grow and expand our categories, we are committed to working with our makers to consciously source materials with low environmental impacts, to create collections that are anchored in transparency while remaining quintessentially SIR.

Good Earth Cotton® + FibreTrace®
Good Earth Cotton® is earth’s first carbon positive farm, located here in Australia, which harnesses FibreTrace® technology to allow transparency throughout supply chains. A Good Earth Cotton® farm sequesters more carbon than it emits, making it carbon positive and an inherently low impact, natural fibre. 

FibreTrace® is a luminescent pigment applied to fibres and yarns in the initial stages of the raw material or spinning processes. The pigment can be scanned at every stage of the supply chain, allowing for auditing at each of these stages: farming, fabric mill, garment factory, warehouse, through to retail and customer. FibreTrace® provides insight into the pure composition of all fibres used to construct a garment, ensuring integrity and authenticity in the chosen fibre for our SIR. collections are exactly what reaches our customers. FibreTrace® can be applied to Cotton (Organic, BCI, Good Earth Cotton® and Conventional), Recycled Cotton, Recycled Polyester, Recycled Polyamide, Responsible Viscose, Responsible Wool, with trials underway for Responsible Leather and Linen.  

SIR. utilises responsibly sourced cotton and cotton blends for several ready-to-wear cotton stories. Our cotton is sourced in line with Uyghur Forced Labour Prevention Act which requires traceability from cotton grower to fabric mill and manufacturer. 

A portion of our seasonal knitwear is crafted with natural wool. 

Our wool is sourced through UPW, who are celebrated for their commitment to both animal and environmental protection and are RWS accredited. The Responsible Wool Standard (RWS) is an industry tool that provides benchmarks that address animal welfare and land preservation in the shepherd industry. 

Through auditing the supply chain from farm to finished garment, RWS ensures transparency of all tiers of supply is achieved. 

Linen has been at the core of SIR. collections since inception. As a durable, long-lasting natural fibre that biodegrades, linen continues to be a staple in our collections for its wearability and low impact on our planet. 

Sourced from the fibre of the Ramie plant, Ramie is a natural fabric that is biodegradable, requires little irrigation and minimal use of chemical pesticides for growth. 

Our signature SIR. knit pieces are constructed using fully fashioned techniques. This innovative technique means that our garments are knitted to shape then linked at the seams to achieve minimal to no yarn is wasted in the manufacturing of these garments. 

SIR. Denim is crafted with Good Earth Cotton® and FibreTrace® technology that allows us to track every stage of a garments’ journey through the supply chain. 

Good Earth Cotton is the world's first Carbon Positive farm, which harnesses FibreTrace® technology to allow transparency through supply chains. From seed to garment, our denim is then woven and handcrafted in Turkey using e-flow technology and biomass boilers to ensure water and energy saving protocols are met.

Our Men’s natural denim pieces are composed of an undyed blend of recycled and organic cotton. Crafted in Spain, our makers utilise technology to transform post-industrial and post-consumer cotton from raw materials into a repurposed yarn to form a natural cotton fabrication. This process promotes circularity in the textile industry, curbing waste from deposition in landfills and reducing the environmental impacts of standard cotton farming. 

Crafted in Italy by leading conscious textile innovators, the recycled polyester fabrications used throughout SIR. collections are composed of post-consumer polyester fibres and waste. 

Repurposed polyester fibres eliminate the need to produce virgin polyester, a process that has negative implications on the environment, and supports a circular system for the garment and fashion industry.

Originating from wood sources, Lyocell is crafted through the use of non-toxic chemical dissolvents to create wood pulp, which is then spun into fibres. The chemical use in the process makes Lyocell a semi-synthetic fibre, however its natural derivatives ensure the material remains both biodegradable and compostable. The manufacturing process of Lyocell is a relatively short, and simple process, which minimally impacts the environment leaving almost no trace of pollutive waste. As a wood cellulose based material, Lyocell can be sourced from a variety of fast growing sources such as eucalyptus trees and bamboo, making it an environmentally friendlier alternative for our material choices.