Fabric class and item | Between layers | Between cover and cloth layer |
Thickness of cover | Thickness of cover |
100% Nylon fabric | Average of longitudinal test≥ | 5.25 | 3.15 | 4.50 |
Minimum of longitudinal test≥ | 3.85 | 2.40 | 2.85 |
100% other synthetic fabrics | Average of longitudinal test≥ | 4.50 | 3.15 | 3.50 |
Minimum of longitudinal test≥ | 3.85 | 2.40 | 2.85 |
Cotton canvas | Average of longitudinal test≥ | 3.00 | 2.20 | 2.60 |
Minimum of longitudinal test≥ | 1.95 | 1.60 | 1.95 |
Other natural fabric | Average of longitudinal test≥ | 3.15 | 2.35 | 2.80 |
Minimum of longitudinal test≥ | 2.70 | 1.60 | 2.20 |