For h2o the one way to get into your jacket would be the stitches! To stop this you can use drinking water proof sprays which might be utilized for leather shoes and boots. So by h2o proof sprays you can also make our leather jackets one hundred% h2o proof !!! http://martineuhsd.diowebhost.com/27110829/indicators-on-zipper-real-lambskin-leather-jacket-for-woman-you-should-know