These smocks were commonly used by Luftwaffe ground troops in Sicily and Italy where Italian camo materials were available. I attached an original photo for reference. This smock is professionally made and is a large size. It is in superlative condition. It is elasticated in the waist and wrist areas.
The shape is similar to German style SS smocks. Foliage loops were sewn on to the shoulder and back areas. Luftwaffe ground troops often wore camo patterns that were made from Italian camo materials.