Fast Feet Grinded Collaborative Pilot
The aim of the pilot was to test and validate the FastFeetGrinded footwear recycling process by evaluating the quality of outputs and understanding the environmental impacts of the process. FastFeetGrinded is a company specialising in footwear recycling that accepts all types of footwear as feedstock to produce sorted material granulates with zero waste streams. FastFeetGrinded aims to deconstruct any type of pre- and post-consumer shoe, separating footwear into substituent components, which are then subsequently grinded down and processed to create material streams for repurposed use.
What's the challenge?
The fashion and textiles industry has increasingly turned its focus toward circularity, with many stakeholders investing in and working on textile-to-textile recycling. However, the challenge of footwear recycling remains persistent due to its more complex and nuanced process compared to textile recycling. According to estimates, 24 billion shoes are added to the market each year, and a staggering 90% of shoes are either landfilled or incinerated.
Footwear is traditionally made using a vast array of different materials, resulting in design complexity that makes it difficult to recover materials in a technically and economically feasible manner. In addition, the lack of widespread footwear recycling solutions and infrastructure hinders the recovery of footwear products. Therefore, collaborative and innovative efforts are needed to enhance footwear circularity.
Executive Summary
Fashion for Good launched a pilot with partners adidas, Inditex, Target and Zalando, in collaboration with innovator FastFeetGrinded, aiming to test and validate the footwear recycling process and support the uptake of recycled materials in footwear.
Through this collaborative pilot, the partners diverted pre- and post-consumer footwear to FastFeetGrinded, who then processed the feedstock into various new material granulates. FastFeetGrinded and their network of supply chain partners then produced demonstrator output products, such as yarns, socks, sports floor samples, and even a new footwear product. The brands then closely evaluated the products’ quality and purity.
This project is a first in the footwear industry as it allows us to understand the sustainable recycling technologies and infrastructures needed to accelerate the transition towards a circular future. By fostering collaborative partnerships like this, where companies come together to share knowledge and validate innovation, we pave the way for scalable solutions
Goals of the Project
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Specify input and output products to enable necessary supply chain links for collection, sorting, recycling, and manufacturing
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Testing FastFeetGrinded’s footwear recycling process and evaluate quality and purity of the outputs produced across various material buckets
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Validate and produce output products for demonstration using FastFeetGrinded’s network of supply chain partners
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Conduct a screening LCA on FastFeetGrinded’s process to determine the environmental footprint, from a carbon, water and waste perspective, compared to a defined base case
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Project Results
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For mechanical recycling of footwear, improvements in the purity of the subsequent output materials are necessary for supply chain re-entry.
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Sequencing of multiple technologies along the footwear waste supply chain, from waste aggregation through recycling, are key to obtaining high purity outputs that can be integrated into new footwear products.
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Innovators
Innovation Partners
Relevant Resources
Key findings from the Fast Feet Grinded Collaborative Pilot
Fashion for Good Partners adidas, Inditex, Target & Zalando Join Forces with FastFeetGrinded for Circular Footwear
Pioneering the Future of Footwear: A New Initiative by Fashion for Good
Fashion For Good Partners With Adidas, On and More Brands to Make Footwear’s Supply Chain More Sustainable
The Amsterdam-based platform for sustainable innovation is rolling out a new initiative designed to help shoe brands and retailers make their sourcing and manufacturing processes more environmentally-friendly.
Other Projects
Feedstock Activation Europe: FAE
Project FAE (Feedstock Activation Europe) is an initiative led by Fashion for Good to channel post-consumer textiles as feedstock for textile-to-textile recycling at scale. It addresses a core gap in the value chain: today, sorters cannot viably prepare post-consumer material at the price, quantity and quality recyclers require, leaving most non-rewearable textiles with no viable destination.
Mass Balance Demonstrator
The Mass Balance Demonstrator project aims to adopt and scale up biomass-attributed PET by implementing the mass balance attribution (MBA) chain-of-custody model. Its core purpose is to replace fossil-based feedstocks with renewable feedstocks, thereby speeding up brand-driven decarbonisation.
T2T Pre-Assessment Questionnaire
The T2T (textile-to-textile) Pre-Assessment Questionnaire aims to accelerate the adoption of textile-to-textile recycling technologies by establishing a standardised due diligence framework for brands and recyclers. Developed by Fashion for Good with support from Textile Exchange, it addresses a critical gap in the industry: the absence of reliable, comparable data on environmental impact and technical performance across recycling technology providers. The tool reduces duplicative, ad-hoc information requests by replacing them with a single, structured assessment that captures what brands need to know and what recyclers need to communicate.
