Halocho #564 - Wearing wool and linen

The Torah prohibits wearing clothes made of both wool and linen - this is know as Sha'atnez.

Even a single woolen thread in a linen garment is Sha'atnez, and a single linen thread in a woolen garment is Sha'atnez.

Threads made of a mixture of linen and wool may not be used.

Woolen garments with linen patches are also forbidden.

However, clothes made of leather - even if the wool is still attached - can be sewn with linen.

Source: Kitzur Shulchan Aruch 176:1-2

Rosh Chodesh Sivan will be on Friday.

- Danny
Sunday, 25 Iyar 5770 - 40th day of the Omer