The iRestore Laser Hair Growth System is one of the most popular hair regrowth devices on Amazon. It uses low-level laser therapy (LLLT) to stimulate hair follicles and promote hair growth. The device is FDA-cleared and has been clinically proven to be effective in treating hair loss. It is easy to use, with a hands-free design that allows you to continue with your daily activities while wearing it. The iRestore system is suitable for both men and women and can be used on all hair types. With regular use, many users have reported significant improvement in hair thickness and density.