Thank goodness I found something to replace mypex with – ECOTEX:
The first professional grade, weed control membrane made purely from organic material that is fully compostable, has a low carbon footprint and is naturally fire resistant is now available in the UK exclusively from Hy-Tex. It is made purely from an environmentally friendly alternative called Polylactic Acid (PLA)
PLA is made entirely from annually renewable, starch rich vegetables with production requiring fewer fossil fuel resources and generating less greenhouse gases than traditional plastic fabrics.
Ecotex MulchMat™, which is earthy brown coloured, is also stronger, more durable and easier to handle than any previous “degradable” fabrics and resists airborne seed settlement far better.