I'm constantly experimenting with gloves and mittens. Currently the morning ride is around 0*C so it'd have to be mittens. But the after ride is 12-15*C. Mittens are too much for that, so it's a thinner pair of gloves. I don't like to have to bring extra anything to and back, but there's little choice. If I don't my hands would be either too cold in the morning or too sweating in the afternoon.