Parka Lab Assistants are a variant of lab assistant that appear in Crash Bandicoot 2: Cortex Strikes Back, and N. Sane Trilogy. They lift stacks of iron crates (replaced with a large block of ice in the N. Sane Trilogy) in Polar levels to try and knock Crash Bandicoot off Polar. They appear in pairs lifting the iron crates and drop them down then lift them up and repeat the process.
Crash and Polar will have to either run under the iron crates or jump over them. There is no way to defeat these lab assistants. These are one of the two lab assistant variants that have blonde hair, the other being the double-headed lab assistant.