Here's a video of the root volume perm for thin, soft hair, I am a hairdresser living in Korea, It's easy to use and you can learn it simply by looking at the video. I've been doing root perm on my hair for 4 years. I usually do root perm once after 2 months. You can watch the video on YouTube #ringerperm Thank you for your interest and attention Instagram @ringerperm_ceo #링거펌 #ringerperm #ringervolumeperm #rootperm #rootvolumeperm