It’s called a “baby comfort monitor.” It’s from a Montreal-based startup called Hoko. It includes a temperature and moisture sensor that slips between layers of a small child’s clothing with a plush toy-like unit that indicates whether the kid might be too hot, too cold or too humid.
Invented by two outdoors enthusiasts-turned-dads, the product, which comes with an activities book, is supposed to make sure children are comfortable so parents can plan family adventures without being interrupted by crying or tantrums.