there is nothing better than muffs, the new cat ones are great with the clear window on top to see the buttons, ..BUT the elastic inside is a junk way of holding them on... what i did with my old ones and these new ones was line them up where i wanted and ...at the end on the handle bars... there is a hole in the grip, i lined it up on the muff and drilled a 1/4" -5/16 hole in side of muff and pushed in one of those barbed body plugs with a 1/2-1" head... works great even on the older all material type. holds them in place better as the elastic keeps coming off end of bars. NICE part with muffs is all you need to ride with is light mech gloves.... hands are never cold and WIFE LOVES them.... no complaining.
I did take them off for the trip in Cochrane... MISTAKE cuz i bought KLM 350.00 heated gloves, it was -25 and at 60mph its more like -50, they wrked great for 3 hrs then died and they were worse than the chapest gloves on the market, once the heat goes my hands FROZE, even the other guys i rode with had 509 heated gloves and same thing 3 hours on medium heat. i just took them back and they are saying they wrk as discribed, but they didnt disclose they are shit when no heat is on!!! even grips on high, still FROZE!! i just bought the FXR heated ones as they have the same insulation as there best glove... but they have heat as a back up... i ran at -17 no heat turned on in glove and were good. you would prob only need low power to be comfortable at really cold with grips.