I have a Cali Ocean, delivered 29 Sep 23. I presume it has a 03S bellows.
I have tested it three times in rain:
- 2 hours in light drizzle 0.2mm precipitation rate. Wind 9 mph ENE.
- 1.75 hours in heavier rain 0.9mm precipitation rate. Wind 11 mph SSW
- 3.25 hours in similar rain 0.9mm precipitation rate. Wind 9 mph SSW
In all three cases, the Cali was facing N, so generally not directly into the rain. I always check wind and rain forecast before siting the Cali to keep the rear into any wind as much as possible.
No ingress of rain front, sides or back, no wetting of canvas.