Which factor is crucial to consider for the longevity of hair extensions?

The quality of the hair and proper care methods are fundamentally crucial for the longevity of hair extensions. High-quality hair extensions, whether human or synthetic, are designed to withstand wear and tear better than lower quality options; they tend to maintain their integrity, softness, and appearance over time. Proper care methods, such as the appropriate washing, conditioning, and styling techniques, also play a significant role in prolonging the life of extensions. This care helps prevent damage such as tangling, shedding, or discoloration, ensuring that the extensions remain in good condition for as long as possible.

The other factors, although they may have some influence, do not compare to the impact of quality and care. For instance, while thickness can affect the look and volume, it does not inherently determine the longevity of the extensions. The type of glue used can affect the installation, but if the hair itself isn't of good quality or well cared for, the longevity will still be compromised. Similarly, the color of the extensions is primarily an aesthetic choice and does not inherently affect how long they will last. Prioritizing the quality of the hair and committing to proper maintenance will yield the best results in terms of extension longevity.