What is "Mountain Configuration" ?

I planning to buy a Cirrus and stuck in the comparison between the Turbo and the Sr22 GTS

I just need to know what is the mountain configuration means ?

Hi Moemen,

I think just look over in the left column of the price list and see which options have an “M” inside a triangle next to them. Known ice protection, a pre-heater and eTAWS are some options recommended for that configuration.