TP 4001 by Louis Ferre Hairpieces Top Piece Collection is a pull-thru 100% Human Hair Monofilament Top hairpiece hair addition. The TP 4001 makes adding volume, length and color to your existing hair easy, and is perfect for fine or thinning hair. The Louis Ferre Wigs Top Piece Collection is especially designed to give fullness, and can be attached at various angles, both vertically or horizontally to match the flow of any hairstyle. The well ventilated Crystal Net base is flexible to contour easily, and looks as natural as can be. Only you will know the secret to your perfect hair.