Helium is a colorless, odorless, tasteless, inert element, and it exists only as a noble gas except in extreme conditions. What that has to do with the new Helium jacket from Sugoi is hard to say. But this jacket — which will block wind, breathe, and keep you warm enough when needed — is nearly as light as air. Indeed, did I mention its weight? See this scale? 90 grams, or just 3 ounces!