The preferred style of bamboo sushi rolling mat made of flat slats of bamboo with the green skin on one side. The skin helps keep food from sticking to the mat and the flat slats help make a consistent sushi roll shape. Indispensable for forming sushi rolls. Can also be useful for squeezing water out of cooked greens. Never put a bamboo sushi mat in the dishwasher. 10.75 inches square, woven with cotton cord. Made in China.