For mountain running trail running stay dry and protected 25 layer waterproof fabric with 10 000 hh and taped seams keep rain off and upper body and head dry breathable boasts 10 000 b 1 breathability stretches with body unrestricted running movement delivered through shell39s super soft fabric that stretches with the upper body race ready suitable as part of mandatory kit when race directors rule a waterproof jacket must be carried versatile can be quickly adapted to changing con