Hair System Ventilation

Ventilation has a lot to do with both the appearance and durability of your system. And you’ve got choices. Do you know how the hair is attached to your hair system? Do you care? Wait, don’t answer that! We know it sounds boring, but knowing a little bit about ventilation might help you achieve a better looking hair system.


Ok. So how is the hair attached?

The most popular types of ventilation are called knotting, injection and looping. Knotting is most commonly used in lace base systems but can be used with skin bases as well. Injection and looping are often confused with one another. Both types are only available in skin bases, provide a great look from above and appear as if the hair is truly growing from the scalp.

Injection & looping ventilation overview

Injection and Looping

Injection ventilation

Injection is most common in Remy Hair systems. It requires a thicker base so the hair can be sealed between a layer of polyurethane and silicone. The cool part is there is no hair return. That means all the follicles go in the same direction so tangling is rarely an issue.

Looping ventilation

Looping on the other hand means the hair is sewn through the base almost in a V or U pattern. There is a hair return with looping and it isn’t as strong as injection. The skin layer, however, can be much thinner. And we all know, the thinner the skin, the better that front hairline will look!

Knotting ventilation overview

Knotting is most common in lace base systems but can be used with skin bases as well. The hair is tied around the monofilament material in very tiny knots. These knots are usually available in a few different sizes: double knots, single knots and half knots. The durability vs. appearance values for each is probably obvious. What you really need to consider with knotting is how you like to style your hair.


Double Knots

Double knotting

Double knotting is ideal if you prefer a very thick density, with lots of volume and height. The bigger knot size makes it difficult to lay the hair flat down so your hair style should be fuller.


Single Knots

Single knotting

Single knots are the easiest to lay flat. So if you like the slicked back look or style your hair to lay flat on your head, the single knotting is ideal.


Half Knots

Half knotting

Half knotting (also called split knots) are the smallest and most undetectable knots. They do however, provide some lift. Half knots are even smaller than the single knots and can also be used in a slick back style.


Bleached Knots

Bleached knots

The big news in knots these days is something called bleached knots.  These knots are put through a bleaching process after being tied to the base. This takes out most of the dark color and leaves a virtually invisible knot that really appears to be growing right from your scalp!

Take a stand for single strand!


Single strand construction

We don’t mean to be whistle blowers, but we would like to toot our own horn. Many factories and hair replacement studios will use a technique called multi-strand construction to save money. This means they tie 4-10 hairs into each knot to cut down on manufacturing time. It also produces a much larger knot size.

We kind of consider that cheating, so we use single-strand construction on our bases which means we only tie 1-2 hairs into each knot. No matter where you purchase your hair system, be aware of this deceptive practice. Make sure that your system is made with single-strand construction.

Note: There are occasions when our customers request a very thick hair density level. And we give it to them with a smile. However, when this happens we must use multi-strand construction just to fit enough hairs onto the base.

Browse through our wide selection of custom hair bases and read about the features and benefits they each offer.

Check out High Definition Hair™, a new technology using bleached knots to replicate a natural hairline.