... wool hard feltOur product range includes Felt Strips, Felt Rolls, Polishing Felts, Felt Bobs and Wheels, Decorative Felts, Handicraft Felts, Medical Felts, Printing Felts ... absorption and low abrasion, woollen or blended wool felts are ususally specified. Within each density range ... micron, as in precision filtration.Synthetic felts cannot match wool's performance in compressibility, elasticity, ...