These look like they might make your ride more comfortable.
https://www.amazon.com/Thermacell-THS01-S-p-ThermaCell-Rechargeable/dp/B0089VUGQA
I dont think youre gonna find anything for $50. This is your best bet: http://www.amazon.com/Thermacell-THS01-S-p-ThermaCell-Rechargeable/dp/B0089VUGQA
People talking about heated soles like they are some new invention. If your feet are that cold in the winter then here you go https://www.amazon.com/Thermacell-THS01-S-p-ThermaCell-Rechargeable/dp/B0089VUGQA
If people really wanted to control the temp or have more features then throw some bluetooth and a sensor into them and connect them to your watch and/or phone. Then you can control the temp, see how many steps you take. Anything. Don't need a block chain when your phone can keep track of everything.