Marmot discontinued the Crystalline as of 2018.The Marmot Crystalline jacket is a high functioning, ultralight, breathable layer meant for high aerobic, high-intensity days outside in inclement weather. It is overshadowed in lightweight and athletic performance by the Outdoor Research Helium II, but not by much. For those with trouble fitting the svelte shape of the Helium II, the slightly more feminine curvature of the Crystalline just might fit the bill, at a small cost of 0.7 ounces.
The Marmot Crystalline skyrocketed into the spotlight. It gives the Outdoor Research Helium II a run for its money--keeping up in waterproofness and breathability, as any good rain jacket should. Overall, it couldn't beat the Helium II for our Top Pick for rain protection award, but not by dint of any major flaws. Instead, OR proved itself with better focus on the purpose of the jacket: as an ultralight, simple, athletic rain jacket. No frills, fewer pockets. The Crystalline had a few extras that detracted from its purpose. Still a great jacket.
Outerwear is designed for function first, but style is often a close second. The Marmot Crystalline emerges as a winner in the style department with a bold use of white in a rain jacket. The light color is translucent and elegant and melds the color you're wearing underneath into the jacket. We were surprised at first by this choice but quickly grew to like the crisp, crystalline look it lends to your outfit.