I have before I put on the sweater, tested the product on workmanship and have not found. Very nice finish, the fabric is very soft and relatively stretchable. Generally I find the sweater also very nice. Very thin material, permeable to air. Suitable for indoors or more warmer days.
Caution is necessary here anyway. Can only confirm the review of another. Unfortunately acts undress the sweater too fast and torn a small hole under the armpit, so a star deduction (pflegliches deal!).
Therefore, it is not a sweater to "Night and Fog" perform actions.