Although the felts are grown almost， but in fact there is still up and down the level of the different grades， the quality of the felt is also different.

　　The current felt is divided into special products felt， a felt， the difference is based on the thickness of wool， density and color to distinguish； technical requirements are by no strength， elongation， capillary action to be divided by inspection FZ / T25001-92 standard test.

　　So small partners in the future when buying felt must be a good distinction between the level， and then choose for their own use of blankets.