Just like with your real hair, too much heat can damage it. The same is true for the hair on a lace wig. To achieve the curls or waves you want, try using flexi rods or magnetic rollers. These items can be found at your local Walmart or Target. This is one of the safest ways in keeping your unit damage-free and extended the life of the hair.
If you want to have a custom wig designed just for you, please visit www.couturelacecrowns.com or contact me at firstname.lastname@example.org.