How long can you use a travel system?
Short answer: Typically from birth, moving from the carrycot or car seat to the seat unit as your baby grows. Always go by the age, weight and development limits in the instructions for your model.
Product limits vary, so check the instructions and the product page.
- Check exactly what is in the bundle: carrycot, seat unit, car seat, adapters, ISOFIX base.
- Check that the car seat suits your car and meets R129 (i-Size).
- Take your baby out of the car seat when you arrive. Car seats are not for long sleeps.
What the guidance says
- It is fine for a baby to fall asleep in a car seat while you travel, but take them out as soon as you arrive.
- Car seats: look for ECE R44.04 (or R44.03) or i-Size R129, shown by the 'E' mark label.
Related questions
What is a travel system?
A bundle of pushchair chassis, carrycot or seat unit and infant car seat that click onto the same frame.
Shop at Baby Kingdom
- Stomp Urban 10 Piece Travel System with Maxi-Cosi Cabriofix i-Size Car Seat & ISOFIX Base
- Stomp Luxe Cirrus I-Size Travel System & Home 14 Piece Bundle
- Stomp Luxe Travel Bundle with (Black) Radial i-Size Plus 360 Spin 40-150cm Isofix Car Seat
- Stomp Luxe Elements Edition 16 Piece Travel Bundle
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
What infant car seats does Baby Kingdom sell?When should I buy a carrycot?Is a pram right for you? Quick quizCan an 11 month old sleep in a car seat?Guide to car seats: what to look forIs a pram right for you? Quick quizAll prams, pushchairs and travel systems advice →
Sources
- NHS: Sudden infant death syndrome (SIDS) (accessed 2026-10-21)
- The Lullaby Trust: Baby mattresses and bedding (accessed 2026-10-21)
General information only, not medical advice. Always follow your product's instructions. If you are worried about your baby, contact your GP, health visitor or 111. In an emergency, call 999.