Light protective and packablesportful39s hot pack 5 jacket offers the perfect mix of wind protection good water resistance good breathability and extreme light weight and packability now in its fifth generation the hot pack 5 jacket continues to set the standard for lightweight weather protection at 79g the hot pack 5 jacket is super lightweight and compact it folds into it39s own stuff sack for storage in your rear jersey pocket the fit and cut has been improved to further enhance