Whether you can use heat tools on a curly human wig depends primarily on the wig’s material—this is the most critical factor to avoid damaging the hair fibers. Below is a detailed guide to help you make the right choice and use heat tools safely (if allowed):

1. First, Confirm the Wig Material (Non-Negotiable Step)
Different wig materials have vastly different heat resistance. Always check the manufacturer’s label or product description first—this information is usually printed on a tag inside the wig cap or listed in the product details.

- Human Hair Wigs: These have high heat resistance, typically tolerating temperatures between 300°F - 400°F (149°C - 204°C). They behave like natural hair, so heat tools such as curling irons, straighteners, and blow dryers are safe to use.
- Synthetic Wigs: Most synthetic curly human wig (made of fibers like polyester or acrylic) have low heat resistance—usually no more than 250°F (121°C), and many can’t handle heat at all. Exposing them to heat will cause fibers to melt, frizz, or break. Only "heat-resistant synthetic wigs" (explicitly labeled as such) can tolerate low heat.
- Blended Wigs: Heat resistance varies based on the ratio of human hair to synthetic fibers. If the human hair content is 50% or higher, the wig may handle low heat, but you must always follow the manufacturer’s temperature limit (never exceed 300°F / 149°C).

2. If the Wig Is Heat-Safe (Human Hair or Heat-Resistant Synthetic): Follow These Rules
Even for heat-tolerant curly human wig, improper use can ruin the curls or bangs. Stick to these steps to minimize damage:

Step 1: Prep the Wig Before Heating
- Detangle gently: Use a wide-tooth comb or wig-specific brush to smooth the curls and bangs. Start from the ends and work up to the roots—never yank, as this can loosen the wig’s wefts or break fibers.
- Apply heat protectant: Spray a lightweight, alcohol-free heat protectant evenly over the wig (focus on the bangs and curly ends, which are more prone to heat damage). Let it dry completely before using heat tools.
- Secure the wig: Place the wig on a wig stand or mannequin head to keep it stable—this makes it easier to style the bangs and curls without pulling.

Step 2: Use Heat Tools Correctly
- Control the temperature:
- For human hair wigs: Start at 300°F - 350°F (149°C - 177°C); avoid exceeding 400°F (204°C), as high heat can dry out the hair and fade color.
- For heat-resistant synthetic wigs: Never go above 250°F (121°C)—even a few extra degrees can melt the fibers.
- Limit heat exposure: Hold the heat tool on each section (especially the bangs, which are shorter) for no more than 10-15 seconds. For curls, use a curling iron with a barrel size matching the wig’s original curl pattern (e.g., 1-1.5 inch barrel for loose curls) to avoid altering the style too much.
- Avoid over-styling: Heat tools strip moisture from wig fibers over time. Try to style the wig with heat only 1-2 times per week (or less, if possible).

3. If the Wig Is Not Heat-Safe (Regular Synthetic): Avoid Heat—Use These Alternatives
For standard synthetic curly bob wigs (non-heat-resistant), heat tools are a no-go. Instead, style the bangs or refresh curls using heat-free methods:
- Refresh curls: Mist the wig lightly with water or a synthetic wig conditioner spray, then gently scrunch the curls with your hands to revive their shape.
- Style bangs: Use a damp comb to shape the bangs (e.g., sweep them to the side or straighten slightly) and let them air-dry. You can also use small hair clips to hold the bangs in place while they dry for a subtle style.

4. Post-Heat Care to Extend the Wig’s Life
After using heat tools (if allowed):
- Let the wig cool completely before brushing or storing it—hot fibers are more fragile and prone to breakage.
- Wash the curly human wig every 2-3 uses (or when it looks dull) with a wig-specific shampoo and conditioner (avoid regular hair products, which can build up on fibers). For curly styles, use a moisturizing conditioner to keep curls bouncy.
- Store the curly human wig on a stand or in a breathable wig bag to maintain its shape—never crumple it, as this can cause the curls or bangs to become frizzy or misshapen.

In short: Always check the material first. For human hair or heat-resistant synthetic wigs, use heat tools carefully with low temperatures and protectant. For regular synthetic wigs, skip the heat and opt for gentle, heat-free styling.