The non-stick mat has a perforated texture, covered with food grade silicone. Since dough contains about 60-80% water, the perforated texture allows the water to seep through the mat, leaving a perfect crusty . Use for your homemade , pizza, and bread! It is effective for freezing, proofing, and baking for all dough types as well as perfect for the par-baking of tarts. The mat must be used flat and placed on a tray preferably perforated for a better circulation of the heat. To clean the mat, use a soft sponge under running water. colour:black & red Material:Silica gel size:40x30cm Package Contents: 2 x Baking mat Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.