трёхслойный bedeutet auf Englisch

three-ply▼(having three strands or layers)
adjective
[UK: θriː plaɪ] [US: ˈθriː ˈplaɪ]

triple▼(composed of three layers)
adjective
[UK: ˈtrɪp.l̩] [US: ˈtrɪp.l̩]