Quick Summary
The Mountain Warehouse Cannonball Kids 3 in 1 Waterproof Jacket is a kids coat in Blue (01) for ages 11-12 years. It is described as a 3-in-1 jacket, with an outer waterproof shell, an inner lightweight jacket and both layers worn together for warmth.
The jacket also includes taped seams, a detachable hood, zipped pockets, rip stop fabric, anti-pill fabric and waterproofing tested to 2,000 mm. If size and layer setup matter for the child, check the selected age band and the intended wearing combination before choosing an offer.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | Mountain Warehouse. Useful for identifying the exact jacket range. |
| Product type | Kids 3 in 1 waterproof jacket. A single item with layered wear options. |
| Colour | Blue (01). Check the colour variant if matching existing outdoor clothing matters. |
| Size | Kids Size 11-12 Years. Confirm the age band before selecting an offer. |
| Waterproof rating | Tested to 2,000 mm. Useful when comparing against the weather protection you need. |
| Construction features | Taped seams, rip stop fabric, anti-pill fabric and a detachable hood. |
| Storage | Zipped pockets for keeping items stored more securely. |
| Layering | Wear as the outer shell, the inner jacket, or both together. |
What to Compare Before Buying
- Size: This version is for 11-12 years. Check the age band against the child’s current fit needs.
- Layering: The jacket has three wearing options. Compare whether the child needs just a shell, a lighter layer, or both together.
- Weather protection: It is tested to 2,000 mm with taped seams. Compare that figure with the conditions you expect to face.
- Colour: This version is Blue (01). Check the selected colour if that matters for school or outdoor wear.
- Included features: The detachable hood and zipped pockets may matter if those details are important in daily use.
Who This Product May Suit
This jacket may suit a child who needs a waterproof outer layer with the option of adding warmth from the inner jacket. The 3-in-1 setup gives more than one wearing combination, so it is relevant if you want one coat that can be adapted across different weather.
It is also a practical match when the age band, colour and hood style are all part of the decision. The taped seams and waterproof testing make the weather protection detail a key point to compare against the intended use.
Important Limitations
The waterproof figure is stated as 2,000 mm, so buyers wanting a higher level of weather resistance should compare other options with a stronger rating. The jacket is also sized for 11-12 years, so fit depends on that age band.
Before You Decide
Confirm the 11-12 years size, the Blue (01) colour and the 3-in-1 wearing setup before choosing an offer. If the child needs a different fit or a different waterproof rating, compare another version first.





