What is dab made out of?

Answer 1

Butane hash oil (BHO)—also known as dabs, honey oil, wax, oil, shatter, or budder—is a potent marijuana concentrate that can exceed 80% THC content.
Growing in popularity in recent years, BHO is hailed by some as “the future of cannabis” while others fear it could harm the image of the legalization movement.
The pro-pot community is somewhat divided over dabbing. Dale Gieringer, PhD of NORML in California, says there has been a recent uptick in hospitalizations for cannabis overdose, which he attributes to rising use of BHO.
Allen St. Pierre directly attributes BHO's popularity to marijuana’s still mainly illegal status. 'Contraband product tends to become more potent under prohibition. This appears demonstrably
true for cannabis, as the more the government commits resources and energy to ban cannabis, the more potent the herbal drug has become over the years.'

Answer 2

Dabs are just concentrated doses of cannabis in the form of a sticky oil.