Complex sentence: This is mistakenly to avoid the risk of hypothermia caused by using helium as inflator gas, many chose to use Argon due to it's properties as an insulator, even though differences in heat loss due to changing the drysuit inflator gas is minimal.
Split into simpler sentences: This is mistakenly to avoid the risk of hypothermia caused by using helium as inflator gas. Argon, even though differences in heat loss due to changing the drysuit inflator gas is minimal.