environmentally friendly, child-friendly, best features for long days in the snow . the ninge bib pants come with a dryplay 10k/10k membrane for maximum waterproofing and breathability, while the teflon ecoeliteâ„¢ dwr coating adds extra protection.so the pants don't get too small after one season, these pants offer the grow-with-me system. cargo pockets provide enough storage space for snacks and the pockets on the side are softly lined.best function for great days on the mountain.