A few posts ago, I did a tutorial on how to make fleece-lined pants. According to my instructions, those ones were not reversible, but these ones are.
All that I've done differently here is the waistband. When cutting your two pairs of identical pants, cut one pair a couple of inches taller at the waistband. (In this case my flowery fabric is the taller of the two). When finishing the waistband, skip my step where you tack down the four seams. Instead, fold that longer/taller fabric over and hem it nicely, then fold it over again to make a casing for the elastic (on the outside of your opposite fabric). Why didn't I think of that the first time?
Now they are totally reversible. And I totally want a pair.