The fabric strips between the fingers are called fourchettes (see https://en.wikipedia.org/wiki/Glove for a description). So the gloves have a front, back and the fourchettes. Some gloves use a single fourchette running between all the fingers and the tips of fingers, like the equestrian gloves I modified to fit, shown here.

Winter gloves often have a separate lining, which could be fleece or knitted fabric. Effectively this means there are two gloves, one inside the other.

The surprising fact about the winter gloves I am modifying here is that they also have a plastic bag between the two layers. At the end of each finger, there's a plastic tab that goes through the plastic bag to connect the finger tip of the inner glove to the finger tip of the outer glove.