These Thick Heavy Duty cutting mats are self healing and made of a unique self healing composite material which provides a non-stick, non-marring surface with 1 cm grid lines. You can use the cutting mat as a desk blotter or work surface, it literally heals itself when cut. These cutting mats are double sided. The green non-glare surface is impervious to cuts, abrasions and liquid spills and will not dull blade.