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Many synthetic wigs do not respond well to heat; some might melt when you're opening the lid of a hot oven or trying to blow-dry them. Before using any heated hair-styling tools on your wig, make sure to check its label. Look for phrases like "heat-friendly" or "heat-resistant." If there is none, you shouldn't risk burning your wig. Even if your wig is heat-friendly, opt for the lowest heat in order to avoid damaging your wig. If you set the flat iron too high, the wig might melt. Wait a few minutes until the iron is hot enough. Ideally the temperature of the flat iron shouldn't exceed 240 F (116 C). When the wig is on the mannequin head, use your hands to divide it into two layers: top and bottom. Use to clip to stabilize the top layer. Take a small section from the bottom, around 1 inch (2.5 cm) in width, and apply the iron from the roots to the ends. Once you're done with the bottom layer, take off the clip, and take a small section from the top layer. Apply the flat iron, using the same method as you did on the bottom layer. Continue until you covered every part of the wig. Don't hold the flat iron on one spot for longer than a few seconds, as overexposure to heat might harm the wig. During straightening, gently brush out the wig using a natural bristle brush. This will help make the strands look soft and shiny. If you don't have a straightener or want a softer feel, go for a hot-air brush. You can use it after lightly spraying the wig with detangler, fabric softener, or plain water. Move it down the wig slowly, letting the brush dry the fibers.
Check if your wig can bear exposure to heat. Preheat your flat iron on the lowest temperature. Clip up the top layer of the wig, and straighten the bottom layer. Remove the clip, and iron the top layer. Use a natural bristle brush while heat-styling your wig. Use a hot-air brush on your wig for increased volume and softness. Finished.