Re-stack is a sustainable carpet design made of Econyl® and wool. At the moment used mixed-fibre carpets get incinerated or end up on landfill because its hardly possible to separate the materials. Being easily separable the Re-stack retains the circularity of its used resources while being able to combine different fibres. The first version of the Re-stack is a multi-layered weave with a thick pile, which shows the contrasting characteristics and haptics of both fibres on a homogenous surface. The pattern depends on the double warp but can be varied through rhythmic colour changes in the weft, altering pile heights and contrasting yarns. Another version of the Re-stack pictures an even stronger contrast between the sleek but soft surface of pure wool felt stuck on a tufted relief made of Econyl®. Unlike the woven Re-stack this version allows organic shaped patterns as it features two separately made layers giving a hint on the initial idea of a simple stacking system. Econyl® is a polyamide fibre which is made of recycled nylon waste such as unusable fishing nets and old carpet pile. The chemical process ensures the same quality as nylon made of new caprolactam and can be endlessly repeated. Wool is a natural fibre with terrific features and it is an over 200 year old tradition in Prato, Italy, to recycle old wool clothing and pre-consumer waste of the textile industry in a mechanical carding process. After its use Re-stack can be separated into monomaterials by simply tearing it apart – without any additional chemicals and under any circumstance – and is therefore easily recycable. The loop can be closed when a new generation, the Re-stack! 2.0, is woven out of regenerated Econyl® and recycled wool.