Amazon.com : Invisible Wire Hair Extensions with Transparent 。Dark walnut Brown 20” wavy NEW!! Specification： Each pack includes: 1 piece of 4 clips in wefts; 2 wires in different length for replacement; adjustable hooks get the most suitable size. Upgraded wire is thicker and more elastic, not easy to break and not cause any pressure on the scalp. Secure Fit: 1. 4 clips sewn on the weft will keep the hair extensions stay in place. 2. Thicker and invisible wire allows the extension to lie smooth and flat on the head like a secret headband. 3. New S Hook will prevent the wire from falling off. Easy to Apply: 1. Position the wire hair extensions over your head like a headband. 2. fix the 4 clips in your hair. 3. Use your own hair to hide the wire. Taking less time for instantly thicker and longer hair in few minutes. Color Difference: Considering the light and different monitors, the exact color may be slightly different from the color shown in the picture. We will try our best to describe the piece in detail. Care Tips: Unlike your own hair, this hair extension may get tangled without nutrition. You can use detangle spray or get a spray bottle and put some conditioner in it and add water. If there is no conditioner, just spray some water, then use a wide tooth comb to brush it. Start from ends and work towards the root to decrease shedding.