What Canada's baby sleepwear rules actually require
Most baby sleepwear pages say the garment is safe. Very few say what that word is standing on. In Canada it stands on a specific regulation with a specific test and a specific number, and the number is easy enough to explain that there is no good reason not to.
The regulation
Children's sleepwear sold in Canada falls under the Children's Sleepwear Regulations, SOR/2016-169, made under the Canada Consumer Product Safety Act and registered in June 2016. The regulations split sleepwear into two categories and treat them differently.
Loose-fitting sleepwear covers nightgowns, nightshirts, dressing gowns, bathrobes, housecoats, robes and pyjamas in sizes up to 14X. Tight-fitting sleepwear is defined as everything else in that size range, and the definition explicitly includes sleepwear designed for infants weighing up to 7 kg.
Sleepers are named in the regulation as an exclusion from the loose-fitting category. A zip sleeper is tight-fitting sleepwear by definition, not by a manufacturer's description of it.
The test
Tight-fitting sleepwear is tested to the Canadian General Standards Board method CAN/CGSB-4.2 No. 27.5 — a 45-degree angle test with a one-second flame applied to the fabric surface. To pass, the time of flame spread has to exceed seven seconds.
That is the whole requirement, and it is worth sitting with how modest it sounds. Seven seconds is not a claim that the garment is fireproof. It is a floor: fabric that carries a flame faster than that does not belong on a sleeping child.
Loose-fitting sleepwear faces a more demanding set of requirements, which is the part people usually get backwards. The stricter test applies to the looser garment.
Why the looser garment is tested harder
Because the risk is in the air, not the fabric.
A loose nightgown holds a layer of air between the cloth and the skin. That air feeds combustion and gives a flame room to travel. Loose fabric also catches on things — it trails, it billows, it reaches a heat source before the child does. Snug fabric sits against the body with very little oxygen between the two, which slows ignition and slows spread.
So the regulation asks more of loose sleepwear because loose sleepwear is doing more of the work. Snug construction is regulated less heavily because the construction itself is carrying part of the load.
What this means when you are shopping
A snug sleeper is not a manufacturer cutting corners. The close fit is the safety feature. If a sleeper for a newborn seems narrower through the chest than the babygrow you were expecting, that is the regulation working.
Fibre content does not answer the flammability question. Cotton, viscose from bamboo, modal, polyester — none of these tells you whether a specific garment passed the test. The test is run on the finished fabric, not the fibre name. A brand that answers a safety question with a fibre name has answered a different question.
Ask what was tested, and by whom. Testing to CAN/CGSB-4.2 No. 27.5 produces a report. A brand that has one can say so. A brand that describes its sleepwear as safe without naming a standard is describing a feeling.
Where Wamé sits
The Bamboo Zip Sleeper is tight-fitting sleepwear under SOR/2016-169 and is designed to the close-to-body fit the category requires. Independent third-party laboratory testing covering flammability, lead, phthalates and fibre content will be completed before any Wamé product is offered for sale.
We will publish the results when we hold them, not before. If you are reading this before launch, that testing has not yet been completed, and this sentence will change when it is.
One thing the regulations do not cover
Flammability is a manufacturing question. How warmly a baby is dressed on a given night is not, and no regulation can answer it for you. The Public Health Agency of Canada's safe-sleep guidance is the place to start on room temperature, layering and what belongs in a crib.