Slack-fill describes the empty space in a packet, such as the air in a bag of potato chips. Slack-fill can be deemed illegal if it's not functional. Halo Top, Mondelez, and Whole Foods have all been ...

Have you run across the term “down fill power” while shopping for sleeping bags, puffer jackets, or a duvet? These numbers range from 450 to 900, and sometimes above. Generally—but not always—the ...