Complex sentence: Cooling is accomplished by the evaporation of sweat through the fabric (instead of water cooling systems), the unpressurized and elastic suit allows finer and less laborous movements (which leads to less fatique and more manual accuracy), has less mass and is much simpler.
Split into simpler sentences: Cooling is accomplished by the evaporation of sweat through the fabric (instead of water cooling systems). The unpressurized and elastic suit allows finer and less laborous movements (which leads to less fatigue and more manual accuracy), has less mass and is much simpler.