The Grumman Down Jacket has been a staple in thepacks since its inception, but Stone Glacier often found that it was just more insulation than Stone Glacier needed for most early season conditions. Enter the Grumman LITE Down Jacket. Ultralight yet packed with 850+ fill HyperDry goose down and a weather-resistant face fabric, the Grumman LITE hunting jacket provides the exact same functionality as the original Grumman but in a minimalist design made for milder conditions.