Within the scope of the assessment of mechanical durability, TÜV SÜD Product Service tested the following criteria:
1. Dimensions according to EN 1167: Testing is based on the EN 1167 standard (see Basis of certification). The duvet is measured and assessed in new condition as delivered.
2. Washing: The duvet is washed and dried six times according to the instructions on the care label. Following inspection for damage, the duvet is measured to see whether its dimensions have changed following washing. Depending on the extent of changes in the duvet's length, width and height, it is rated from 1 (unsuitable) to 5 (optimal).
Changes in length or width (%) Points
Changes in height (%) Points
3. Testing for feathers and fibres leaking out of the duvet: The numbers of feathers and fibres leaking out of the duvet are recorded and assessed on a new duvet (after purchase) and a used duvet (after ten washes). Depending on the number of feathers leaking out of the duvet, the product is rated from 1 (unsuitable) to 5 (optimum).
Leakage of feathers or fibres Points
- No leakage 5
- Very little leakage 4
- Slight leakage 3
- Significant leakage 2
- Extreme leakage 1
4. Homogeneity of filling material after washing: The homogeneity of the filling material is determined with the help of thermography. Any differences between the duvet in new and washed conditions are registered and documented.