Yesterday I bought a bamboo sheet called Ma Jiang sheet which is put together with small bamboos. It looks like Ma Jiang pieces. My friend told me it is the coolest sheet to sleep on during hot humid summer. I usually sleep face down. That night when I put my chest on the sheet I thought my heart would stop. It was much colder than I expected. I was worried about if it is too hard to sleep on. Because the bamboo pieces are small, it will fit on my body shape. I did not feel like sleeping on bamboo. I had a good sleep without turning air-condition.