Virgin hair reacts to heat the same way your natural hair will, and with repeated use of heat styling tools, the extensions can become damaged and frayed. Instead of curling irons, Dotson says a rod-set is the way to go. “A roller-set is truly amazing. It stretches out that cuticle, makes the hair nice and shiny, gives it volume and lasts up to two full weeks without having to re-curl the hair,” says Dotson. Pin-curling the hair at night will extend the life of your roller-set.