So i've just bought some very nice 18 inch long real hair extensions. I tried them in and though they looked OK, i thought they looked a bit thin at the ends, so i used a curling tong to lightly curl with my own hair, that was a great improvement. Anyway, what i was wondering as this is all new to me, when i take them out of my hair should i put the extensions in large rollers to maintain curl or does the heated curl i put in whilst i was wearing them stay that way forever. I've watched some you tube videos but they were mostly about how to put them in. Thanks for any help.