Yes, it is not only possible but also a popular choice for many to rock hair toppers with hair extensions. By combining the two, you can add even more volume, thickness, or length to your mane, taking your hair to new heights of fullness and lusciousness. But it's important to make sure that your hair topper and extensions work well together and blend seamlessly – after all, the last thing you want is for your hair to look mismatched or unnatural. So don't be afraid to consult with a hair expert to ensure that your hair topper and extensions are a perfect match, giving you the gorgeous, full-bodied hair of your dreams!