Best Amazon Hair Extensions
Channel Selena Gomez on the Cheap With These 7 Hair Extensions For Under $25
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Some reviewers say they use clip this Yiroo Virgin Straight Hair ($20) into sew-in wigs to thicken things up. And it's durable. According to one, "I've put heat on it pretty much every day for two weeks, washed and conditioned this hair and it still looks good."