The longevity of a human hair wig largely depends on several factors, including the quality of the wig, how well it's maintained, and how often it's worn. Here are some general guidelines:

1. Quality of the Wig: High-quality human hair wigs, especially those made from premium virgin or Remy hair, can last much longer than lower-quality wigs. They can endure daily wear for 1 to 2 years or even longer with proper care.

2. Maintenance: Proper care is crucial for extending the lifespan of a human hair wig. This includes regular washing, conditioning, and styling, as well as storing the wig properly when not in use.

3. Frequency of Wear: If you wear the wig daily, it will naturally experience more wear and tear compared to occasional use. If you have multiple wigs and rotate them, each wig is likely to last longer.

4. Styling and Heat: Frequent heat styling, such as curling or straightening, can cause damage to the hair fibers and reduce the wig's lifespan. It's advisable to use heat styling tools sparingly and at lower temperatures.

5. Climate and Environmental Factors: Exposure to extreme heat, humidity, and pollutants can affect the wig's quality over time. Store the wig in a cool, dry place when not in use and protect it from environmental elements.

6. Hair Length: Longer human hair wigs may experience more friction and tangling, which can lead to quicker wear and tear compared to shorter styles.

7. Professional Maintenance: Some wig wearers choose to have their wigs professionally maintained and styled, which can help prolong their lifespan.

In summary, a well-cared-for high-quality human hair wig can last anywhere from 1 to 2 years or longer, depending on how often it's worn and how it's maintained. It's essential to follow the care instructions provided by the wig manufacturer and consider professional maintenance when necessary to maximize its longevity.