Understanding the Science Behind Different Kinds of Hair Extensions

Understanding the science behind hair extensions involves a comprehensive look at the types of hair used, the methods of application, and the maintenance techniques. This knowledge is essential for anyone looking to use or work with hair extensions, as it ensures the best match with natural hair and the longevity of the extensions.

Human vs. Synthetic Hair:

The choice between human and synthetic hair is significant. Human hair extensions, sourced from real human hair, offer a natural look and feel. They can be styled, colored, and treated similarly to natural hair, making them a versatile choice. Their durability and ability to blend seamlessly with the wearer's hair make them a popular choice. On the other hand, synthetic hair extensions are made from artificial fibers. They are less expensive but offer limited styling options. Unlike human hair, synthetic extensions can't withstand high temperatures and often have a different sheen, making them look less natural than human hair extensions.

 Remy vs. Non-Remy Hair

The distinction between Remy and Non-Remy hair is fundamental in the world of hair extensions and dramatically affects both the quality and user experience of the extensions.

Remy Hair:

1. Cuticle Alignment: Remy hair is appreciated for having undamaged hair cuticles that are oriented in the same direction. This natural alignment is critical because it mimics normal hair growth, giving the extensions a more natural look and feel.

2. Less Tangling and Matting: The aligned cuticles minimize tangling and matting, both of which are common problems with lower-quality hair extensions. This makes Remy hair simpler to style and manage.

3. Appearance and Texture: Remy hair is smoother and more natural looking. This is because the cuticle alignment more equally reflects light, giving the hair a healthy and vibrant gloss.

4. Durability: Remy hair is more robust and can endure styling treatments better than non-Remy hair due to the intact and aligned cuticles. Despite its premium price, its longevity is a significant reason for its popularity.

5. Sourcing: Remy hair is frequently sourced to maintain cuticle alignment, such as by cutting directly from a donor. Ethical sourcing and management are critical to preserving the integrity of Remy hair.

Non-Remy Hair:

1. Mixed Cuticle Directions: Non-Remy hair is often collected from a variety of sources, including hairbrushes and salon floors, resulting in a mixture of hair strands with cuticles pointing in diverse directions. This lack of uniformity causes many of the problems linked with non-Remy hair.

2. Tangling Prone: The mixed orientation of cuticles generates friction and tangling, making hair challenging to handle. Tangling can also cause matting and an untidy appearance over time.

3. Shorter Lifespan: Generally, non-Remy hair has a shorter lifespan than Remy hair. Tangling and matting and potential harm from attempting to disentangle and style the hair frequently necessitate more frequent replacement.

4. Processing and Treatment: Non-Remy hair is frequently subjected to extensive processing to eliminate the cuticles and reduce tangling. This procedure may use harsh chemicals, altering the hair's natural look and feel.

5. Affordability: The most prominent advantage of non-Remy hair is its low cost. Because it is less expensive than Remy hair, it is more widely available. However, lower prices frequently imply lower quality.

In conclusion, while Remy hair represents a higher quality, more durable, and natural-looking option, non-Remy hair offers an affordable alternative. The choice between the two depends on individual needs, preferences, and budget. Users need to weigh these factors along with the extensions' intended use and desired longevity.

Single vs. Double-Drawn Hair

Single-drawn hair extensions are made up of strands of varying lengths, giving in a more natural, tapered finish at the ends. They are typically less expensive and create a more natural appearance. On the other hand, double-drawn hair extensions are made up of hair strands of uniform length, giving the hair a fuller and more voluminous appearance from top to bottom. Double-pulled hair is frequently more expensive because of the thorough sorting required to achieve consistent length.

Origin and Ethical Sourcing


The origin of hair extensions is crucial because it influences their quality. Extensions can come from a variety of places, each with its own set of qualities. Indian hair, for example, is often thick and adaptable, but European hair is finer. Ethical sourcing is also essential for ensuring that donations are handled honestly and compensated. This factor affects not just the quality of the hair but also the industry's ethical standards.

Hair Textures

Understanding hair textures is essential when it comes to matching extensions to natural hair. The hair follicle's shape and the hair shaft's structure define the texture. Round follicles and shafts produce straight hair, whereas oval or irregular shapes produce wavy or curly hair. The chemical connections within hair fibers also influence texture, contributing to the curl pattern and overall texture of the hair.

The variety of hair extensions caters to different needs:

-Clip-In Extensions: These are ideal for interim style because they are quickly inserted and removed.

- Tape-In Extensions: These are more permanent and require professional installation, as they are attached with double-sided tape.

- Fusion/Bonded Extensions: These extensions provide a natural look by fusing individual strands to the hair with a heat tool.

- Micro Bead Extensions: Attach with tiny beads without the use of heat or adhesive for a secure fit.

- Sew-In Hair Extensions: These are stitched into braided hair and are commonly used for thicker, coarser hair types.

- Halo Hair Extensions: These extensions rest on the head with an invisible wire and are simple to install and remove.

- Ponytail Extensions: These extensions enhance ponytail styles and are simple to attach.

Caring for Hair Extensions

Hair extensions must be adequately cared for and maintained in order to last. Shampoos and conditioners that are gentle and sulfate-free are advised. Use heat styling products sparingly, and always use a heat protectant spray. Brush the extensions gently to prevent tangling and damage. To avoid tangling, tie your hair loosely when sleeping.

Hair Extension Application Process

There are various procedures for applying hair extensions correctly. Before applying, the hair must be clean, dry, and detangled. The hair is then sectioned off for even application. Each type of extension requires a different method of attachment, which must be followed to create a natural blend and avoid harm to the natural hair.

Understanding Hair Growth Phases

Understanding the hair development cycle is essential in the context of hair extensions since it influences how the extensions interact with natural hair and aids in overall hair health. There are four stages in the hair development cycle: anagen, catagen, telogen, and exogen. Each of these stages is important in the growth and shedding of hair.

Anagen Phase (Growth Period)

Duration: This phase lasts between 2 and 7 years and influences hair length.

Hair cells divide fast during the anagen phase, resulting in new hair growth. This is the stage at which hair begins to grow vigorously.

Extensions Relevance: Understanding this stage is critical for extensions since healthy growth can withstand the weight and stress of hair extensions. Extensions placed on hair during the anagen period are more likely to be stable and last longer.

2. Catagen (Transition) Phase

Duration: About ten days.

The catagen phase is a transitional period in which hair development slows, and the hair follicle decreases. The lowest section of the hair is severed from its blood supply, as well as the cells that form new hair.

Extensions Relevance: Because the hair is not actively growing during this phase, it may not sustain extensions as well as it does during the anagen period. This stage is critical for determining when to reapply or remove extensions.

3. Telogen (Resting) Phase

Duration: Approximately three months.

Characteristics: The hair follicle is fully at rest during the telogen phase. This stage is characterized by hair shedding.

Extensions Relevance: It's vital to understand that hair is more prone to losing out during the telogen period. This natural shedding should not be confused with hair damage caused by extensions. However, being aware of this stage can aid in understanding normal hair loss and managing extension care.

4. Exogen Phase (Shedding Period)

This is a part of the telogen phase and involves hair shedding.

During the exogen phase, old hair comes out, and new hair begins to develop from the follicle. This is a natural element of the hair renewal process.

Extensions Relevance: Recognizing this stage is critical because it can have an impact on the volume and thickness of natural hair. This knowledge might help you alter your hair extensions to retain a natural look.


To summarize, the science underlying hair extensions is comprehensive and includes a wide range of topics, from the type of hair used to application and care methods. Understanding these aspects guarantees that the extensions blend in with the natural hair and are appropriately maintained for a lifetime. This knowledge is invaluable for anyone interested in utilizing or dealing with hair extensions.

Back to blog