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All FAQs

• Which competitive brand infant car seats are compatible with the Britax Brook/Brook+ Modular Stroller?

  Not all competitive brand infant car seats are compatible with the Brook/Brook+ Modular Strollers. For competitive brand infant car seat compatibility, refer to https://cdne1britaxus.azureedge.net/bri/uploads/user-guides-videos-and-comparison-charts/Compatibility-Charts/1.5-Britax-Brook-ICS-Compatibility-US-2023.pdf

• What finish treatment is used for the Water-Resistant, UPF 50+ Canopy?

  The Brook/Brook+ Modular Stroller canopy is treated with PU (polyurethane) + a NON-fluorine based acrylic finish for water resistance. It meets all GTP (Garment Performance Test) requirements, and no chemicals are added for UPF 50+ protection.

• Will the Britax Brook+ Modular Stroller convert to a double stroller?

  The Brook/Brook+ Modular Stroller is a single stroller only.
  

• Which Britax Infant Car Seats are compatible with the Britax Brook/Brook+ Modular Stroller?

  Not all Britax infant car seats are compatible with the Brook/Brook+ Modular Stroller. For Britax Infant Car Seat compatibility, refer to https://cdne1britaxus.azureedge.net/bri/uploads/user-guides-videos-and-comparison-charts/Compatibility-Charts/1.5-Britax-Brook-ICS-Compatibility-US-2023.pdf. As of the Brook/Brook+ Modular Stroller launch, the Britax Willow/Willow S Infant Car Seat are the only compatible Britax Infant Car Seats for this stroller. Future Britax Infant Car Seats will also be designed to fit with the Britax Brook+ Modular Stroller.
  
  NOTE: Compatibility on the US vs. Canadian products may be different.
  

• What are the child weight and height capacities of the Britax Willow/Willow S Infant Car Seat?

  The Britax Willow/Willow S Infant Car Seat should only be used rear-facing with children who weigh between 4 and 30 lbs. (1.8 and 13.6 kg) and who are 32” (81.3 cm) in height or less. The top of the child’s head should be 1” (2.5 cm) or more below the top of the child restraint shell, and the harness straps should be in the closest harness slot below the child’s shoulders.
  

• Is the Britax Willow/Willow S Infant Car Seat approved for use on aircraft?

  The Britax Willow/Willow S Infant Car Seat is certified for use in motor vehicles and aircraft. Follow your user guide instructions to properly install the car seat on an airplane.
  

• How can I customize the Britax Willow/Willow S Infant Car Seat to create the perfect fit for babies of ALL shapes and sizes?

  Customize to Baby’s Size with the RightSize™ system. It provides adjustment points at the hips, shoulders & between the legs to create your baby’s perfect fit from the start. The car seat offers four shoulder harness slots ranging between 5.5 - 11.5 inches, two hip anchor slots, and three crotch buckle slots ranging between 2.25 - 5.5 inches for the perfect fit.
  

• Is the Britax Willow/Willow S Infant Car Seat compatible with B-Safe Gen2 Infant Car Seat Bases?

  The Britax Willow/Willow S Infant Car Seat is not compatible with previously manufactured Britax base models. For base compatibility, refer to https://cdne1britaxus.azureedge.net/bri/uploads/user-guides-videos-and-comparison-charts/Compatibility-Charts/Britax-ICS-Base-Compatibility-Wave-1.5-2023-Optimized.pdf.

• Which Britax strollers are compatible with the Britax Willow/Willow S Infant Car Seat?

  The Britax Willow/Willow S Infant Car Seat is compatible with the Brook/Brook+ Modular Stroller. Also, if you attach the Britax Adapter Accessory for MAXI-COSI, CYBEX, and NUNA, the Britax Willow/Willow S Infant Car Seat will be compatible with the Britax B-Free and B-Lively. For stroller compatibility, visit: https://cdne1britaxus.azureedge.net/bri/uploads/user-guides-videos-and-comparison-charts/Compatibility-Charts/1.5-Britax-Willow-ICSA-Compatibility-US-2023-Optimized.pdf

  
  NOTE: Compatibility on the US vs. Canadian products may be different.

• Is the ReboundReduce Carry Handle on the Britax Willow/Willow S Infant Car Seat required to be in the upright position when installed? (With or without the base)

  The carry handle is approved (in the US) to be in any locked position (with or without the base) in the vehicle. For additional stability, Britax recommends that the ReboundReduce carry handle be in the upright position (Position 1) to help reduce the rebound of the child restraint in car accidents. It is required for the carry handle on Canadian models to be in the upright position (Position 1) for use in a vehicle. Always use the upright position (position 1) to carry.

• Can I install the Britax Willow/Willow S Infant Car Seat without using a base?

  Yes. There is an extra belt path on the back of the seat for added security when installed without the base.

  
  

  Before installing the Britax Willow/Willow S Infant Car Seat without the base, follow these steps:

  
  1. Secure the child in the child restraint before installing in the vehicle;

  
  2. Check that your vehicle seat belt is compatible with the child restraint by referring to your vehicle owner’s manual; and

  
  3. Check your vehicle owner’s manual to determine how to lock your vehicle belt system.

• Does the Britax Willow/Willow S Infant Car Seat meet the applicable requirements in the new FMVSS (Federal Motor Vehicle Safety Standard) Side Impact Rule?

  Yes. The details of the Final Ruling became available to the public on June 30, 2022, with a three-year phase-in deadline of June 31, 2025, for manufacturers to comply.