With Thule Sleek, you get the flexibility of a double stroller in the size of a single. It is easy to change configurations-add accessories and get a car seat stroller combo or a toddler stroller. The twin mode lets you mount two bassinets or two seats and still have a compact stroller, making it easy to get around in crowded spaces. A future-proof solution that makes your active life easier. Can be expanded, for siblings of two different ages or twins. Comfortable large seating area, w.