Micro Ring(micro bead or micro loop) hair extensions are suitable in adding thickness and length to your hair. It dones't require any glue, heat, keratin bonding or sewing, there is not any damage caused to your hair.Micro Ring Extensions AdvantagesHealthy: applied professionally with micro rings, which is harmless to your hairUndetectable: attached with micro rings, which is very tinyExtensions Type: Micro Ring/Loop Human Hair ExtensionsHair Type: remy natural real human hairTexture: straight, a little wavy because of packaging, can be straightened and curledHair Length: 14"-24"Hair Color: there is little color difference with different monitor, thanks for your understandingHair Weight: 50gram per pack, 1-2 packs for adding volume, 2-3 packs for stretching lengthLifespan:2-3 months depending on care and usageHair CareWash the hair with mild conditioning and shampoo in warm water , 2-3 times for every weekGently rinse and brush the hair with downward motion, staring at the bottom, then gradually moving up until all is brushed outDo not sleep with wet hair, braid the hair or ponytail when sleeping to avoid tanglingDon't put the hair in the sea or alcohol