I'm giving Hot Chillys a 5 because you really can't compare to how well they work. But the price of long children's underwear has failed. They can only be worn for one season and need to be washed daily because who can afford a spare pair?
Pros
We skied and she carried them the whole trip. Hot Chilly's is the best and this model is fun.
Cons
May not be suitable for extremely cold weather. Although these pants are designed for mid-weight insulation, they may not be suitable for extremely cold temperatures, which may limit their versatility as a winter base layer.