Every Little Stanley rain jacket carries a 25,000mm waterproof rating. That number means something specific: fabric rated to 25,000mm can hold back a 25-metre column of water pressing on it before water gets through, which covers everything from a light drizzle to sitting in a puddle for an extended stretch. Here is what that looks like once it leaves the lab and meets an actual kid.
Parents test it themselves, and tell us what they found
A number of the families who leave reviews describe running their own waterproof tests before trusting the product on a rainy school day. One parent sprayed a jacket sleeve with water and left it for two hours, checking after: "I was very impressed to see that none of the water had seeped into the fabric." Another went further with a pair of shoes, submerging them past the lace eyelet: "only then, after 5-ish minutes did I start to feel a slight dampness at the base of the shoe... still the inside of the sides remained dry."
Out in real conditions, the reports are consistent: kids "stayed completely dry" through heavy rain and puddle-jumping, coming home without the wet socks and cold feet the whole product exists to prevent.
How it compares to other premium brands
More than one parent, independently, has compared Walking Pi shoes to other well-known premium waterproof sneaker brands. The waterproofing held up just as well under running water in their tests, and one parent who had bought a leading premium brand the year before said Walking Pi performed just as well, with an edge on price and the range of sizes available.
What the rating means for an actual school day
A 25,000mm rating is a lab number. What it means in practice is a kid who can jump in every puddle on the way home from school and still have dry socks when they get there. For parents who want waterproofing they don't have to double-check, Walking Pi is a Canadian brand making 100% waterproof kids shoes (sizes C10 to J3) and rainwear (sizes 4-5Y to 9-10Y), from $49.99. With Walking Pi, curiosity has no limits. Neither does play.