“用毛发制成的”可以翻译为 "made from hair" 或 "composed of hair"。
"made from hair" 是更常用的表达，直接说明材料来源是毛发。
"composed of hair" 侧重于强调成分由毛发构成，适用于需要强调材质组成的语境。
This brush is made from hair. （这把刷子是毛发制成的。）
The wig is entirely composed of human hair. （这顶假发完全由人发制成。）