Can We Walk On Mars Without A Spacesuit

If you were to step outside a spacecraft such as the international space station or on a world with little or no atmosphere such as the moon or mars without the protection of a space suit then.
Can we walk on mars without a spacesuit. If you were to venture there without any gear you would survive for less than 2 minutes provided that you held your breath. Also i suspect that cooling the suit would be easier since there s atmosphere so they can get away with a less bulky cooling system than what was used on the moon. Trace explains the process of terraforming in order to one day. You would become unconscious within 15 seconds because there s no oxygen.
Yup a spacesuit for mars should need less protection than one for the moon since it s farther from the sun and has at least a little atmosphere to block radiation. What happens to you if you try to walk around mars without a spacesuit. Lack of oxygen will cause you to los. Atmospheric pressure on mars is very low.
How could this be possible. Insofar as the human body is concerned you might as well be in empty space.