First Form

This form is the first transformation, or most basic suppressor of power for Freeza Race transformations, consisting of either a bio suit, no clothing whatsoever, or most fashionably, a top for Saiyan warriors. 
This form is used by Freeza Race but is not used by the entire population of them, as Freeza Race are born at a set level of power, which most do not bother to train to increase. 
People such as Cooler are among the stronger specimens, and hold a power further than their final form. The form used by people such as Cooler was assumed to be their evolution state until Freeza revealed the 'Golden Form' or 'Ultimate Evolution' but it is rumored that said form is simply the true form of much stronger Freeza Race beings.
Even while being suppressed in their First Form, most Freeza Race can still destroy an entire planet or star with ease.