Stone Glacier | Grumman LITE Down JacketUltralight and packable down insulation worn as an outer layer during static activity in cool conditions or layered underneath a shell in cool, wet conditions. The Grumman Down Jacket has been a staple in our packs since its inception, but we often found that it was just more insulation than we 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