grundens neptune 509 bib trouser - black - small grundéns inspired by neptune, the roman god of freshwater and the sea, the neptune collection is waterproof, stain-resistant, and flexible so you can move with ease. from durable jackets to waterproof pants, we have you covered. commercial fishermen were front of mind when designing the neptune bib trouser. made from medium-weight pu material and a balance of fit and stretch, you have complete waterproof protection and ease of movement required for long hard days on deck. the bib includes strategically placed pockets and adjustable features that will come in handy when you least expect it.