All the hair I use I've worn and I don't exactly treat them great, I wash with Pureology - the best stuff, use my armgan oil but I use heat most days, curl my extensions loads and don't use heat protector as my scalp is very sensitive so if the hair can last with my mistreatment it can last o. My clients who all follow aftercare and us my recommended products. I've just washed twice with cheap shampoo, no conditioner and curled with my cloud 9 wand and the sample still feels lush. I will be washing it next with head & shoulders, no conditioner and putting heat to see how its fairs. I have to treat it the worst way possible to see how it holds out as I have always said if the hair is brilliant to start with it will withstand mistreatment and still be ok then its worth investing as my clients are good with their hair but they wash their hair often, to swimming, gym, on holidays, exposé their hair to sun, sea, salt water so I need to see what its like under extreme circumstances and extremely bad treatment! Just the way I test my hair. People must think I'm mad!