The Sitka Delta Wading Jacket is a classic waterfowl piece from Sitka that has been recently discontinued. As far as I can tell this is just because Sitka wants you to get into their proprietary layering systems which currently do not require a rain shell. However a shell is incredibly versatile with layering and this one is feature-packed with Gore-Tech 3L fabric and a wide variety of pockets and adjustability. With it being discontinued it is also being offered at a low price at a number of vendors so go check it out if you're looking for an excellent tough shell.