Last updated: August 11, 2021

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Welcome! Women with wavy, curly and frizzy hair who are looking for perfect curl definition must have heard of the hair diffuser, right? The accessory helps not only to dry the wires, but does so in a way that curls are preserved and more defined. But do you know which is the best hair diffuser for you? That's what we're going to talk about in this article.


  • The hair diffuser is an accessory that is fitted to the nozzle of the hairdryer.
  • The diffuser distributes hot air and dries the hair evenly, defining curls and removing frizz.
  • As there are several types of hair diffusers, it is necessary to consider some factors in order to buy the best one. The main ones are size, shape and compatibility with the hair dryer.

The best Hair Diffusers: Our Picks

Buying Guide

It is never simple to buy an accessory that will be worn in the hair. After all, there is a wide variety of options and what is good for one type of hair is not always good for everyone. The same happens with the hair diffuser. In this Buying Guide we will answer your questions about this accessory.

Mulher de cabelo crespo.

The hair diffuser dries and defines curls. (Source: Starkvisuals/

What is a hair diffuser?

The diffuser is an accessory that fits into the air outlet of the hair dryer. Because of its shape, the diffuser is responsible for leaving hair with defined curls and frizz-free. The rounded shape of the diffuser distributes air better and allows for uniform drying. In addition, this accessory helps define the curls with the help of the teeth inside the diffuser. Therefore, the hair diffuser is an indispensable accessory for those who have curly, frizzy or wavy hair.

What is a hair diffuser for?

While the hairdryer spreads the heat and can end up undoing the curls, the hair diffuser maintains the curly integrity of the strands. But in addition to helping define the curls, the hair diffuser also dries the strands more efficiently, without wind. Therefore, with the hair diffuser it is possible to avoid frizz. The hair diffuser, as its name suggests, is therefore used to diffuse the dryer's air between the strands of hair, drying the strands evenly. By distributing the air throughout the strand, the diffuser protects your hair from a direct blast from the hairdryer.

Mulher usando difusor de cabelo para definir os cachos.

With the diffuser you can keep the curls in the format you want and without frizz. (Source: progressman/ )

Who should have a curl diffuser?

If you have wavy hair, curly or frizzy should invest in a hair diffuser. After all, the device in addition to helping define the curls also helps dry hair evenly, eliminating frizz. And as it is a simple device to be used, you can and should use it at home. And if you are a hairdresser, it becomes even more necessary to have an accessory like this to help with the finishing and styling in your salon.

What are the types of hair diffuser?

Nowadays, with the popularization of the hair diffuser, there are several types for sale. Each type of hair diffuser allows you to perform the definition according to the type of curl you have, whether it is larger or smaller, or just a very natural wavy. Check out the table below showing the main types of hair diffuser you will find:

Traditional diffuser Large diffuser Handheld diffuser
Feature Standard size Larger model In the shape of a hand, fits any dryer
Ideal for Curling medium and long hair Faster curling 360-degree airflow allows natural drying from the root

How to use the hair diffuser?

Before you start using the diffuser, remove excess water from the hair. Then, detangle the hair with a wide-toothed brush or comb. It is worth highlighting that whenever you use the hair drier, either with or without diffuser, it is essential to use a thermal protector to protect your hair from the intense heat. Then, follow the step-by-step instructions below to use the curl diffuser effectively:

  • Divide your hair into locks and place each lock of hair in turn into the diffuser nozzle;
  • Always use the diffuser from the bottom upwards, making a back and forth movement;
  • Do not leave the appliance standing for a long time in the same position or on the lock of hair;
  • Never use a very hot temperature in order not to damage the strand;
  • When all the locks are dry, apply a jet of cold air (without the diffuser) to ensure brighter curls and prevent even more frizz.

Is there an ideal diffuser for every hair type?

Although each type of diffuser gives a different result, there is no single model for every type of curl. According to experts, any diffuser can be used on any type of hair, be it short, medium or long, be it curly, curly, wavy, regardless of the type of curl. What weighs here is your personal taste. So, the best thing to do is buy the diffuser and test it on your hair until you find the one you think is best.

Anyway, it's important to consider that, depending on your hair type, you can adopt practices and use specific products both to protect your hair, such as heat protectant, and to help define and maintain the curls before and after using the hair diffuser. For example, one technique that you can adopt to help shape your curly hair is to use a styling process before using the diffuser.

Did you know that the way you use the diffuser can influence the way your curls will look? If you want well-defined curls, the diffuser should be positioned on the tip of the strands and you should make the movement from bottom to top. To gain more volume, throw all the hair forward and blow dry from the bottom up. But if you just want to dry your hair, without defining the curls too much, position the hair diffuser in parallel direction to the strands

What are the advantages and disadvantages of the hair diffuser?

If you use the hair diffuser correctly it will bring more advantages than disadvantages. The main benefit of the diffuser is that it dries curly, wavy and frizzy hair in an even way. This means it does not scatter the hair and maintains the curls. Because of its shape and mode of operation, the hair diffuser is then responsible for further defining the curls when drying them.
There are several types of diffusers, with different sizes and shapes.

This way, the curls remain longer without coming undone. Another advantage is that there are different types of diffusers, with different sizes and shapes. This way, you can use the curl diffuser efficiently on long, medium and even short hair. On the other hand, if you use the diffuser on a very hot temperature you may end up damaging your hair. Another disadvantage is that the diffuser needs to be compatible with the dryer nozzle to work properly. However, as we'll see later, there is a universal model. Below, check the table illustrating the main advantages and disadvantages of the hair diffuser:

  • Dries and defines curls
  • Ideal for curly, wavy and curly hair
  • Can be used any length of hair
  • There are several models of size and shape
  • At high temperatures can damage the hair
  • Needs to be compatible with the dryer

How much does it cost and where to buy a hair diffuser?

The price of a curl diffuser depends on the brand and model. Generally, you will find this accessory costing between GBP$ 2 and GBP$ 39. As it is a very popular accessory it will be easy to find the hair diffuser for sale in specialty shops, department stores and even hypermarkets like Casas Bahia and Extra. But if the idea is to have more options to choose from and still buy the hair diffuser without leaving home, opt for shops like Amazon Brazil.

Purchase Criteria: How to compare hair diffusers

To choose the best hair diffuser amidst so many different models, we recommend that you take into consideration some aspects that differentiate one accessory from another. They are:

Below, you check out how to analyse each of these factors.


The first criterion you should take into account when choosing the best hair diffuser is size. The larger the diffuser, the more amount of hair you will be able to dry and style in one go. However, smaller diffusers can be ideal for those looking for even greater curl definition.


In addition to size, look at the shape of the hair diffuser. You will find options for shallower diffusers and others with a deeper concavity. The first one may be more practical to be used in short hair. But this model is also efficient for those who want to dry and define the curls only at the ends of the hair.

Mulher de cabelo cacheado.

If you have a lot of hair and hurry, better choose the deep format diffuser. (Source: Jenffffjjjppp/ )

The deeper diffuser, on the other hand, is able to accommodate more hair, which can be ideal for those with long strands. In addition, you can also consider the handheld diffuser which, as we've seen, is the one that can dry the strands from root to tip.


Another criterion you should consider is that there are combos on sale, in which the diffuser already comes along with a hair dryer. In this case, you can choose between two options:

  • Dryer + diffuser
  • Dryer + diffuser + other nozzles

The advantage of buying the combo is that you ensure that the diffuser will fit perfectly with the hair dryer.

Compatibility with a hairdryer

But if you already have your favourite hair dryer and just want to buy the hair diffuser, it is important to check if the accessory and the hair dryer are compatible. To do this, the diffuser needs to have the appropriate fitting for the nozzle of the hairdryer. To make it easier, manufacturers offer a universal diffuser which can be fitted to any hairdryer.

However, the universal hair diffuser does not always actually work perfectly with every type and model of hairdryer. Therefore, the ideal is to test it before closing the purchase. If this is not an option for you, it is best to choose to buy a hair diffuser that is compatible with the model and brand of your hairdryer. In general, the manufacturer indicates this information in the product description.

(Featured image source: foto4inet/