Here are an awesome bibpants which has a double coated SealSkin-material - rainwear on the inside as on the outside!
 
Specific features:
two sides coated fabric
seawater resistance
knee protection with inside pockets for knee pads
elasticated braces
side adjustment
 
Norms:
EN ISO 13688
EN 343
 
Here is a link to the manufactures page where you can find more photos of the product.