Suiting Up

Will Mars colonists need to wear bulky and clumsy space suits similar to those used on the Moon? Conventional wisdom says yes, with the proviso that suits would need to be heated rather than cooled. The surface atmospheric pressure on Mars  is very low and the human body would hemorrhage blood if exposed to it. The atmosphere is largely CO2, so breathing apparatus would be essential. But what about a close fitting development of a neoprene diving suit to protect most of the body from vacuum without additional pressurised protection? I have not seen the idea explored in depth but Mars surface temperatures are very cold. At the Viking landing site the average temperature was minus 55 degrees C and ranged from minus 17 to minus 107. Clearly very extreme conditions but not necessarily beyond the capacity of suitably developed additional arctic weather clothing to cope with. An advanced full-face insulated or heated breathing mask would need to be developed, along with an oxygen tank. but if a full space suit with integral water circulation heating could be avoided, then work on the surface might be much less encumbered and considerably less expensive to equip The insulated clothing needed for wear on top of a neoprene suit would need to be varied but layering of clothing is known to be particularly effective at coping with changing outside temperatures. I suspect the resulting ensemble surface weather gear would give colonists more freedom of movement and a closer experience of the martian environment than a cumbersome spacesuit.