The Agio Z4 is a stroller that’s high-quality, lightweight and easy to use, and starting in 2020 it can now expand to a double stroller. The Z4 single stroller is the same as before, but it can now accommodate two kids when you add double adapters and a second seat. As a single, the Z4 weighs 22 pounds and is 20 inches wide, making it one of the most compact strollers to convert to a double. The Z4 single is available now for 549 at strolleria.com. Starting in February 2020, the second seat will be 249 and a set of double adapters is 59.