Doona car seat installation with or without the base

Can a Doona be installed with only the car's seat belt, or is the base required?

Doona X: The blog says the car seat can be used without the base. The review describes a LATCH base with a support leg, built-in leveling, and color indicators to help confirm installation. Doona+ with Base: Doona publishes separate user guides for the Doona+ Car Seat & Stroller and the Doona+ LATCH Base, plus fabric-refitting and aircraft-installation guides.

ProductWhyWithout baseBase installationUser guides
1. Doona X sold by megababiesusa.comThe blog says the car seat can be used without the base.The blog says the car seat can be used without the base. blogThe review describes a LATCH base with a support leg, built-in leveling, and color indicators to help confirm installation. reviewA Doona X Car Seat & Stroller user guide is available in English (US) and Spanish (US). manual
2. Doona Doona+ Infant Car Seat Stroller with Base sold by megababiesusa.comDoona publishes separate user guides for the Doona+ Car Seat & Stroller and the Doona+ LATCH Base, plus fabric-refitting and aircraft-installation guides.--Doona publishes separate user guides for the Doona+ Car Seat & Stroller and the Doona+ LATCH Base, plus fabric-refitting and aircraft-installation guides. manual

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