1.Upgraded Lace Weft Hair Extensions Compare to the classic rose weft, lace weft (thickness 0.15mm) is thinner and softer than traditional rose weft (thickness 0.25mm) to get a comfortable wear. it lays flat to the scalp and you won't feel any bump. 2.HighQuality Synthetic Hair Japanese technology heatfriendly synthetic fibers, with a natural look and soft feel like human hair, they're also 30% lighter than regular hair fibers extensions,it is more comfortable to wear all day long. 3.5PCS Set Thick Volume One pack hair extensions includes, 1 x 8.5' width with 5 clips, 2 x 7' width with 4 clips, 2 x 3.25' width with 2 clips, length: 24inch,total weight: 250g. you can decide how many pieces to wear base on your own needs 4.Advantages of Clip in Extensions Compared with traditional hair extensions, our lace weft hair extension uses BB clips to fix, no tape, no glue, so it will no pressure, no damage to the scalp, you can restyle the hair in minutes. the long wavy hair extension can perfectly blend with your natural hair, they can be cut, permed and washed.