From the Manufacturer

This product is made of water resistant polyurethane coated nylon with clear thermoplastic polyurethane windows. The Weather Shield keeps rain and chilly winds from your children while still letting them see the world. It has vents that are positioned to allow proper airflow while keeping your child completely dry. They are available for all stroller models. The vents are placed strategically and the attachments are elastic which makes it very easy to use.
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