Needle punched felt refers to felt that is made by vertically needling fibers(wool fibers or synthetic fibers or mixed fibers) together to achieve a desired thickness and density. Then the felt will be processed in high temperature to make smooth surface. The difference with pressed felt is When viewing a cross-section of needled punched felt, the fibers lay vertically, but pressed felt, the fibers lay horizontally.

wool felt technology

Compressed Wool Felt is a textile structure composed entirely of fibers physically interlocked and consolidated by mechanical work, chemical action and moisture without the use of weaving, knitting, stitching, thermal bonding or adhesives.

Manufactured by means of compression, heat and moisture, vibration, then carded and cross-lapped to make multiple layers of material. it's construction depends upon the unique properties of the wool fiber. Wool fibers are unlike any other natural hair products in that their surface structure is comprised of raised scales, which naturally interlock with each other when compressed together.