It is made of cotton and, according to Hans - Joachim Kann in his book Wallfahrtsführer Trier und Umgebung (Pilgrimage Guide to Trier and Surroundings), was probably worn as an outer garment.
अगर ऐसा है, तो यह एक दुर्लभ पहनावा होगा, म्यूज़ियम का एक रोचक भाग ।