Wherever you go it can go with you ultra light packable performancethis jacket isn39t just light it really is ultra light in order to achieve such a lightweight but protective jacket sportful utilise fabrics with an ultra fine denier each yarn is as fine as 7 denier meaning that 1000m of yarn weighs less than one gram the exceptionally small yarns are then woven incredibly tightly providing complete windchill protection at an astonishingly low bulk the fabric is also treated with a d