3,105. Thread Made of Linen and Hemp

Hilchos Kilayim 10:8

Rules similar to the preceding halachos apply if hemp and linen are combined. If the major part is hemp, one may weave these threads together with wool threads; if they’re in even amounts, it is prohibited.

Hilchos Kilayim 10:9

Let’s say that someone made a garment completely out of camel wool, rabbit wool or hemp. If he weaves a single thread of sheep wool on one side and a single thread of linen on the other, the garment is prohibited as shaatnez.