Excellent mat, the quality is amazing, the fabric, sewing everything at the height! Perfect, smooth, with comfortable bag. Flax as stated, inside foam rubber. Needles are pleasant, not too sharp and traumatic skin, but sharp enough to burn in three minutes. Then you get used to it and time increases. I'm ideal for working at the computer, I sit directly on it .. although not very long yet. The seller sent the goods immediately, the quality, the color all match.