The all new mizuno impermalite f10 rain trousers are a lightweight rain pants with 10 000mm water protection and breathabilitydesigned for movement the flex rain pants uses impermalitereg technology to deliver 10 000mm water protection and breathability fit is enhanced by choice of inside leg lengthmizuno impermaliteimpermalite technology delivers 10 000mm water protection and 10 000mm breathability japanese testing standardswaterproofwindproof10 000mm