POP (PutonPieces) synthetic clip-in extension systems are made from kanekalon vibralite modacrylic fiber, the finest quality synthetic fiber available, and are available in either straight or softly waved sets. Affordable, lightweight and easy to attach, these virtually undetectable extensions can be put in and taken out in a matter of minutes. Short hair transforms to luxurious shoulder length hair. Shoulder length hair becomes think and full. The larger tri-level piece adds easy length and/or volume without the hassle of working with several individual wefts. Use this piece by itself or if you want even longer hair, add the smaller bi-level piece of the nape. The larger piece in the system consists of 3 strips of 11-1/2" long hair on overall length of 16-1/2". The smaller piece consists of 2 strips of 12" long hair for an overall length of 15-1/4". Two "duck-bill" hair clips are included for use in attaching the systems. Just clip it in with three easy steps and then enjoy your natural looking long full head of hair that looks incredibly sexy and is a snap to wear.