On the period WWII German photos from the personal archives of German soldiers, you can often see that many of the Wehrmacht soldiers wear not statutory boots, but various kinds of light slippers and half-boots. It is understandable, the soldier was not always at the frontline, often the units were taken to the rear for rest, replenishment and putting themselves in order. They didn't want to wear heavy army boots every day in conditions of relative calm.
Let's try to figure out what the German soldiers were wearing in this case.

The main light shoes that were at the disposal of the soldiers according to the regulations were sports shoes (Sportschuhe). It could be both leather and textile:

Such boots were issued in training and sometimes soldiers took them with them to the front.

Some mountain rangers operating in the highlands were given special light rock shoes (Kletterschuhe), sewn from canvas with leather reinforcement, the sole was made of thick felt or woven from a thin rope. Such boots could be both army-style (photo 1-5) and civilian (photo 6-10).

This type of shoe was light and comfortable, but it did not hold water well due to the characteristics of the sole.

In addition to the statutory light shoes, which were at the disposal of the soldiers, some fighters could bring with them different civilian home or sports shoes. There were plenty of such shoes in pre-war Germany. In the catalogues of those years we can see different models:

As you can see in the photo, the range of civilian leather shoes was very large:

The variety of civilian leather shoes is not inferior to home slippers (Hausschuhe) of various types:

In regions with a hot climate, for example in Africa, Italy or the Crimea, summer sandals were popular.

A soldier at the front is drawn to comfort, and home slippers help him a little in this. As can be seen from the photos presented, the German soldiers had a large selection of so-called bivouac shoes.
We hope that this article will help improve your reconstructed image. Remember, reconstruction is in the details!