I put chemical hand warmers in the toe of my boots in the morning- swap them to my mittens when I'm suiting up. I don't know how anyone has room in the toe of their boot while wearing it for both the chemical warmer and enough air flow for it to actually keep working.
Not within the stated budget, but when I try on new ski boots these days, I swap out the stock liner for a wrap Intuition. They're simply warmer than anything else. And they're stiffer than a lot of stock liners, so I have to try on boots with the Intuitions in place.
I think boot gloves do a decent job - if you put them on a warm boot. But walking in them will quickly wear through the strap. So it's tricky to equip them effectively without reducing their lifespan.
Not within the stated budget, but when I try on new ski boots these days, I swap out the stock liner for a wrap Intuition. They're simply warmer than anything else. And they're stiffer than a lot of stock liners, so I have to try on boots with the Intuitions in place.
I think boot gloves do a decent job - if you put them on a warm boot. But walking in them will quickly wear through the strap. So it's tricky to equip them effectively without reducing their lifespan.