3 modes for growing kids.
Transition from harness booster to high-back booster and finally to backless booster.
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3-in-1 Booster Car Seat, Side Impact Protection
£30.00 GBP
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Shipped with in 24 hours
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Worldwide delivery
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Free returns
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Secure payments
Hybrid SI 3-in-1 Booster Seat
One seat.
One seat.
Three stages.
Forward-facing protection and comfort from harness booster through high-back and backless booster stages.
30–100 lb 5-point harness 4 harness heights Side-impact protection 2 cup holders
Built for growing kids A forward-facing seat designed to transition through three booster stages.
3-in-1Harness · high-back · backless
30–100 lbOverall recommended weight range
57 inMaximum recommended height
16 lbProduct weight
Core features
Designed to grow with your child.
Three important features explain the value of the Hybrid SI at a glance.
5-point safety harness.
Four shoulder-height positions help adapt the first-stage harness fit as your child grows.
Adjustable head support.
Raise the upper support as your child gets taller for a more adaptable fit and added comfort.
Product details
A closer look at the features that matter.
Each image below shows a different product detail. No image is repeated elsewhere on the page.
Forward-facing comfort See the seat used in a real vehicle with the child secured in harness mode.
High-back booster Stage 2 supports children from 40–100 lb and 38–50 in.
Backless booster Stage 3 provides the final booster configuration for children who meet the fit requirements.
Installation hardware Rear view of the seat and its installation attachment hardware.
Harness & side profile
A closer look at the first-stage setup.
See the harness area, side structure and how the seat sits against the vehicle seat.
5-point harness Designed for the first harness-booster stage.
4 harness height positions Helps accommodate changing fit as the child grows.
Padded restraint areas Padded shoulders and crotch cover add comfort around the restraint system.
3-in-1 growth value
One seat through three forward-facing stages.
The seat moves from harness booster to high-back booster and finally to backless booster as your child reaches each stage's requirements.
Harness booster 30–50 lb · 29–48 in · age 2+
High-back booster 40–100 lb · 38–50 in · age 4+
Backless booster 40–100 lb · 42–57 in · age 4+
Recommended use
Clear ranges for every stage.
Harness booster
Forward-facing use with the built-in 5-point harness.
30–50 lb · 29–48 in · age 2+High-back booster
Booster use without the built-in harness, with the back support in place.
40–100 lb · 38–50 in · age 4+Backless booster
Booster use without the built-in harness or back support.
40–100 lb · 42–57 in · age 4+ Travel scene
See the seat in a real travel environment.
The airport setting gives a clearer sense of the product's size when travelling with a child.
Real-world scale See how the seat looks outside the vehicle.
Travel context Helpful visual context for families travelling with child-restraint equipment.
Everyday comfort
Practical details for daily rides.
Reversible soft inserts Added cushioning for comfort and versatility.
Comfortable arm rests Built-in support for everyday rides.
Two cup holders Designed for different cup sizes.
Height-adjustable headrest Supports changing fit as your child grows.
Product specifications
The essentials.
Product type3-in-1 forward-facing booster seat
Harness booster30–50 lb · 29–48 in · age 2+
High-back booster40–100 lb · 38–50 in · age 4+
Backless booster40–100 lb · 42–57 in · age 4+
Maximum recommended height57 in
Product dimensions18 × 21 × 29.25 in
Product weight16 lb
Harness5-point adjustable safety harness
Harness height positions4
Side-impact protectionCushioned padding + side-impact pods
Cup holders2
Batteries requiredNo
Safety note: Always follow the current manufacturer instruction manual and your vehicle owner's manual for installation, harness adjustment, belt routing and stage changes.
FAQ
Good to know.
Is this seat rear-facing?
No. The Hybrid SI is designed for forward-facing harness-booster and booster use.
What are the three stages?
Harness booster, high-back booster and backless booster.
What is the Stage 1 range?
30–50 lb, 29–48 in and age 2+, subject to the manufacturer's fit requirements.
Does it have side-impact protection?
Yes. The seat uses cushioned padding and side-impact pods for added protection.
Does it include cup holders?
Yes. Two cup holders are included.
Why is the price so low?
Special clearance pricing for a limited time
Limited Quantity
01
Stock Overload
This batch is brand new in original packaging. Due to product line adjustments, it is now available at clearance rates.
02
Storage Pressure
Stored inventory continues to generate fees and occupy valuable warehouse space. Fast clearance helps reduce long-term costs.
03
Better Value Now
Buyers receive new goods at lower pricing, while sellers clear inventory and recover storage space.
FAQ
Before Purchase
After Purchase
Q1Why are your prices so low?
This is a warehouse clearance sale. All goods are brand new and supplied in their original packaging.
Q1How can I track my order?
Once your order has shipped, the tracking number will be sent to the email address used for the order.
Q2Are the products new or used?
All products are brand new, unused and supplied in their original packaging. They are clearance or overstock items.
Q2What if my parcel arrives damaged?
Please contact us within 48 hours of delivery and include clear photos of the parcel and item. Our support team will review the case and help with the next steps.
Q3Which European countries do you ship to?
We ship to most European countries. The available destination list is shown at checkout.
Q3What if I receive the wrong item?
Please contact us with your order number and clear photos of the item received. We will review the order and help resolve the issue.
Q4How long does delivery take?
Orders are normally dispatched within 2–5 working days after payment. Delivery to the EU normally takes 7–14 working days after dispatch; customs checks may add time.
Q4How long does a refund take?
After an approved return is received and checked, the refund is sent to the original payment method. Your bank or payment provider may need additional processing time.
Q5Can I check the product specifications before buying?
Yes. Please review the specifications, dimensions and material information on the product page before ordering.
Q5Tracking shows delivered, but I have not received it. What should I do?
Please check with your local post office and neighbours first. If the parcel is still missing, contact our support team with your order number.
Our customer support team is available Monday through Friday,
from 8:00 AM to 8:30 PM.
Average response time: 2 hours
Please email us at support@bdzuml.com