The strap is genuine leather.

这皮带是真皮的。

Is it made of genuine leather?

它是真皮做的吗？

This feels like genuine leather.

这摸起来像真皮。

The sofa is made of genuine leather.

这沙发是真皮做的。

His suitcase was made of genuine leather.

他的衣箱是用真皮制造的。