Rain test: Aer City Pack Pro X-Pac in pouring rain for 10 minutes : r/ManyBaggers
Amazon.com : Joolz - Raincover - Accessory for your Aer Stroller - Perfect Fit - Dry Protection - Compact to Store - Water Repellent - Dries Quickly - Foldable for Easy Storage : Baby
Joolz Aer Stroller Review (100+ Tests by Kid Travel)