Unless you're DominatorJacques, you probably don't own a one-piece. Helly Hansen wants to change that with their Ullr Powder Suit.
Dubbed the "play suit for adults" their Powder Suit is both functional & rad looking at the same time. Featuring their LifePocket, 20k/20k waterproofing/breathability, H2 Flow, their most durable fabric (Helly Tech® Professional 3L), & the internal beacon pocket for those who earn their turns. It also has a relaxed fit, freeride fit to accommodate a back protector and multiple layers if needed. This onesie is perfect for touring/spread eagles/cossacks/ripping resorts.
It's a bit of a hefty price at $850 but a piece you can keep forever if that's your jam.