MDF is good for holding humidity plus you can paint it i have enough mdf to build one cage today to seperate my baby blonde pastel. i havent gotten her yet cause of the weather in the north east i really dont want to use tubs i rather make a nice setup with wood. MDF has no pine or ceder in it so its ok for the snakes what i need is recamendations on sizes cause im gonna build the rack on top of my boas cage which is 4'x2'x2'