Dropstitch - Explaining What It Is?

What is dropstitch? and why are there different quality paddleboards? and why does premium dropstitch allow for a stiff paddle board and cheap dropstitch make a bent SUP board?

[@mhofma12]

Where can you buy premade drop stitch by the yard?

[@marcieliooliveira7181]

Professor, quer transformar minha prancha de stand up peddel inflavel em rígida, o que devo fazer ?