Used Scubapro Climasphere VestScubapro Climasphere Vest, a versatile undergarment for drysuit users seeking additional insulation without compromising mobility. The Climasphere Vest features a soft fleece material with 4 way stretch, breathability, and windproof properties. Unlike competing vests, it also provides insulation around the biceps and arm pits, effectively maintaining warmth in these areas prone to heat loss.