What Kind Of Hair Myamee Wear How Do I Give My Hair Volume So It Is Kind Of Puffed Up..From The Roots To The Tips Its Flat And I Want Volume?

How do i give my hair volume so it is kind of puffed up..From the roots to the tips its flat and i want volume? - what kind of hair myamee wear

My hair has to be of medium length with layers, but always seems very flat.
I want my type of hair volumizer swollen and I understand.
From the root to tip, which is flat on his head. How do I puff / THICKENING him?