Weed suppression cloth - recommendations please

[Defenestratethecat]

We have an area approx 3m square covered in gravel but weeds are appearing through and it looks terrible. As we have time on our hands at the moment we want to sort the mess once and for all. Can anyone recommend a good heavy duty weed cloth?

We just bought a mid-range fabric from B&Q but what we DID do was to lay the fabric in double thickness ie. twice as thick. Three years on we haven’t had any dock, green alkanet etc grow through our fabric & gravel.