Baboo
Britax Römer · Car Seats
Britax Römer ADVANSAFIX M i-SIZE (15m-12y)
★★★★★ 4.8 · 6 reviews
€329.00
€378.99
In stock
incl. VAT · 🚚 free delivery over €49.00 to Germany · 2–4 business days · delivery info
The ADVANSAFIX M i-SIZE is a multi-stage car seat designed to grow with your child from around 15 months up to 12 years. It features an integrated 5-point harness for younger children that easily converts to booster mode, advanced side impact protection and an adjustable headrest for long-term use. ISOFIX installation and SecureGuard belt guidance ensure optimum belt routing and stability. The washable covers and multiple recline positions keep journeys comfortable for both infants and older children.
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Free delivery over €49.00Germany · 2–4 business days
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30-day free returnsUnused items, full refund
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2-year guaranteeOfficial brand warranty
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Secure checkoutEU safety-tested products
Specifications
| Material | Soft-touch, machine-washable fabric; EPS & impact foam |
| Age Range | Approx. 15 months–12 years (76–150 cm) |
| Weight | 12.2 kg |
| Dimensions (HxWxD) | 68 x 48 x 52 cm |
| Certification | i‑Size (UN R129) compliant |
| Installation | ISOFIX + vehicle 3-point belt; top-tether where applicable |
| Max Child Height | 150 cm |
| Harness Type | Integrated 5-point harness (converts to belt position) |
| Recline Positions | 3-position recline |
| Brand | Britax Römer |
| SKU | 159 |
Reviews
4.8
★★★★★
based on 6 reviewsMateo Garcia.✓ Verified purchase2026-06-17
★★★★★
Super soft, perfect for summer nights with a baby who hates socks. The sleepsuit keeps him warm enough without overheating.
Henrik Jensen.✓ Verified purchase2026-06-11
★★★★★
Perfect for a chilly nursery; the bamboo is warm enough but breathable. Our 6-month-old sleeps soundly.
Oliver Schmidt.✓ Verified purchase2026-05-31
★★★★★
Used this in a stroller-friendly sleep setup; the zipper helps me layer with a sleep bag. The bamboo fabric is breathable and warm without overheating.
Elin Svensson✓ Verified purchase2026-05-18
★★★★★
Perfect for our winter nights; the sleeves stay soft against my baby's skin.
Mia Schmidt.✓ Verified purchase2026-05-02
★★★★★
The design is cute and practical—easy to zip up with the zipper guard. The MORI Clever Zip Sleepsuit (bamboo) keeps him comfy.
Valentina Rizzo.✓ Verified purchase2026-04-15
★★★★☆
Gorgeous fabric and it's held up well after many washes. The bamboo is still soft against delicate skin.
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