Wavy bundles specifically may be a good choice for people who have thin hair, but there are several major factors to consider for the best result.
Wavy bundles bring a lot of volume and texture to your hair, making even thin hair appear thicker and more vibrant. And it gives a body and movement because of the natural wave pattern. There are also times when you must use lightweight bundles, especially if thin hair is truly fragile. Extra pounds in bundles might result in too much tension that affects fragile strands badly. To get a completely natural look, bundles must be picked as close to the thickness and texture of your hair.
All the difference will be made by the installation of wavy bundles on thin hair. In addition, they are going to ensure that the heavier extensions do not cause too much stress on your hair. Techniques like sewing in bundles or even tape-ins can distribute the weight evenly and thus not cause such stress to the natural hair. Other incredible alternatives include the clip-in wavy extensions since one only needs to attach them temporarily and then pull them out at your convenience. This way, you avoid causing long-term stress on the scalp and hair.
Thin hair with wave-like bundles also requires maintenance. Light, moisturizing products have to be used so that definition is maintained and not weighed down. Heavy oils or creams tend to make the hair look greasy or flat. These must be avoided. Hair loses matting when it is regularly detangled with special care being taken at the roots.
Wavy bundles you can get thin hair working pretty well if you use only the light ones, properly install them, and gain proper care techniques for your hair. You can then get volume from those bundles as you give a more natural, fuller appearance without overwhelming those fragile strands.