Amazon.com : WindTouh Clip in Hair Extensions Real Human 。【Upgrade Hair Extensions Weight--130g/150g per Pack-Make a Full Head with 1 Set】 New upgrade specifications--14inch,16inch,18inch: 130g/pack. 20inch,22inch: 150g/pack. Don\'t worry about your hair being too thin and need to buy two packs, 1 pack of upgrade weight hair extensions can meet your needs.If you want to pursue a more perfect effect, we also recommend that you pair it with purchasing 110g seamless clip in hair extensions to create natural beauty. 【New Seamless Skin Weft & Invisi Edge--Comfortable & Invisible & Lighter, 9A Grade Human Hair- Can be Style】New clip ins is upgraded on the basis of classic weft clip ins, invisi edge for ultimate comfort, better fit to the scalp, seamless and lightweight. 100% remy hair, as soft as your hair, full from top to end, no drying, no knots. Can be style and dye, control the temperature at 320℉-390℉. 【Upgrade 7 layers PU Bonding Technology-No Shedding & No Stiff & No Pleated, PU Width Narrow Outside & Wide Inside -- More Invisible】Our invisi edge clip in hair extensions uses 7 layer PU glue adhesive bonding technology, no hair shedding, PU hair curtain narrow outside and wide inside, the outer PU curtain is only 6mm wide, the color is closer to the hair color, more invisible.