Patagonia says its , which it unveiled last summer, is the “lightest piece of insulation on the market.” That’s a bold claim, but it could well be true: The 800-fill “shirt” weighs less than six ounces (and costs $250, ). If you plan to use it more like a jacket or super-power midlayer, you’ll have some more options to choose from: the company is going to be releasing versions with a hood and a new slightly more insulated piece called the Ultralight Down Jacket next winter. Yep, that’s one, packed up in that tiny blue sack.
–Justin Nyberg
