As a salon owner or hairstylist, your reputation is built on delivering flawless transformations. But when it comes to sourcing hair extensions, the terminology can be confusing. You already know the difference between Remy and Non-Remy. You know your sources, from Vietnamese to Brazilian hair.

But there’s another critical classification that directly impacts your client’s final look, your pricing, and your inventory: the “drawn” system.

What’s the real difference between Single Drawn, Double Drawn, and Super Double Drawn hair? It’s not just a sales gimmick. It’s the single most important factor for determining the fullness and density of the hair from root to tip.

Let’s break down this essential grading system so you can consult with your clients like an expert and choose the exact product you need to create stunning results.

What Does “Drawn” Even Mean?

Before hair is bundled into a weft, tape-in, or i-tip, it goes through a “drawing” process. This is a manual sorting process where technicians pull (or “draw”) strands from a bundle of raw hair.

How this sorting is done determines the final grade. It’s all about how many strands of the same length end up in the final bundle.

1. Single Drawn (SD): The Natural Taper

What It Is:

A Single Drawn bundle contains hair of many different lengths. Think of it as a ponytail: it has long strands, medium strands, and shorter strands. Only the very shortest hairs are typically removed.

• The Look: Thick at the top (root) and then “tapers” or thins out toward the ends.
• The Analogy: This most closely mimics the natural growth pattern of human hair. Our hair doesn’t all grow to one uniform length; it has a natural life cycle, resulting in varied lengths.

Who It’s For:

• The Client: Ideal for clients who want a very natural, “undone” look.
• The Service: Perfect for adding subtle volume, filling in thinner sides, or creating a natural-looking layered style.
• The Bottom Line: It’s the most common and most affordable option. However, if a client wants 20 inches of length, you may need to trim 2-3 inches off the ends to get a cleaner line, which means you must order longer than you need.

2. Double Drawn (DD): The Full-Volume Standard

What It Is:

Double Drawn hair undergoes a much more intensive sorting process. All the shorter hairs are manually removed twice (hence, “double” drawn). The result is a bundle where the vast majority of strands (typically 70-80%) are the same length.

• The Look: Full and thick from the root all the way to the ends.
• The Analogy: This is the “glamorous” look. It’s the thick, bouncy, high-volume hair seen in magazines.

Who It’s For:

• The Client: This is the ideal standard for most salon clients who are paying for “length” and “volume.” They want the 20 inches they paid for to be full and thick for all 20 inches.
• The Service: Essential for creating thick, blunt cuts (like a sharp bob or lob) and achieving significant volume.
• The Bottom Line: It is more expensive than Single Drawn because the process is labor-intensive and more raw hair is “wasted” (removed) to create the bundle. For a professional salon, this should be your go-to standard for most clients.

3. Super Double Drawn (SDD): The Ultimate Luxury

What It Is:

This is the most luxurious and premium grade on the market. Super Double Drawn hair goes through an even more rigorous sorting process, ensuring that an extremely high percentage (90-95%+) of the hair strands are the exact same length.

• The Look: Uniform, ultra-dense, and perfectly thick from top to bottom. The ends are as thick as the roots.
• The Analogy: This is the “couture” or “VIP” of hair extensions.

Who It’s For:

• The Client: The high-end client who wants the absolute best, thickest hair possible, with zero tapering.
• The Service: Perfect for creating “glass hair” styles, sharp geometric cuts, and looks for photoshoots or competitions where absolute perfection is required.
• The Bottom Line: This is the most expensive option. The labor and amount of raw hair required to produce one bundle are significant. Offering this sets your salon apart as a high-end, luxury provider.

Comparison at a Glance

Why This Matters for Your Salon

1. Managing Client Expectations: When a client says “I want thick hair,” they usually mean they want Double Drawn. If you use Single Drawn, they may be unhappy with the “stringy” or “thin” ends. By explaining this system, you manage their expectations from the start.
2. Justifying Your Pricing: You can now confidently explain why your premium extension service costs more. You’re not just selling “hair”; you’re selling Double Drawn or Super Double Drawn hair, which is a more expensive and luxurious product.
3. Smarter Inventory: You can stock your salon strategically. Perhaps you keep Double Drawn as your main inventory for most clients and only special-order Super Double Drawn for your VIPs.
4. Building Trust: This knowledge positions you as a true expert. You’re not just a stylist; you’re a consultant who understands the technical specifications of the products you use. This builds immense trust and loyalty.

Final Thoughts

Understanding the drawn grading system is just as important as understanding color or texture. It empowers you to stop selling hair and start prescribing the perfect solution for your client’s needs—moving them from Single Drawn (a natural blend) to Double Drawn (the salon standard) to Super Double Drawn (the ultimate luxury experience).