If one is wearing techeiles strings on his tallis katan, and goes up to be shliach tzibbur (lead the prayer), may he put on a shul tallis (prayer shawl) that is non-techeiles, i.e., all white strings? The reverse works as well (someone wearing all white strings puts on a garment with techeiles strings).

The reason I think it may be not allowed is due to the issue of tarti d'sasri, meaning a mutual contradiction.

  • 3
    If someone doesn't have one of the colors, he wears just the other color (Menachot 4:1). Not sure what contradiction you're seeing here.
    – Double AA
    Apr 26, 2022 at 22:29
  • 3
    Rav Belsky only wore techeiles on his talis katan and not his talis gadol. He isn't the only one .
    – sam
    Apr 27, 2022 at 2:23
  • @DoubleAA but if he has both colors and doesn't put them on, there is a possibility of bal tigra
    – Joel K
    Apr 27, 2022 at 6:03
  • @DoubleAA I second JoelK's comment. According to Rav Herschel Schachter, it could be a problem.
    – robev
    Apr 27, 2022 at 10:57
  • @JoelK is that the case here where you have two sets already tied and no extra strings lying around? Anyway...
    – Double AA
    Apr 27, 2022 at 11:07

2 Answers 2


I assume you mean the contradiction would be that your tzitis have tcheiles meaning your posek holds of that techeiles, whereas the tallis doesn't have tcheiles meaning whoever holds of it doesn't hold of tcheiles. Putting aside the debate on whether we know what tcheiles is or not, wearing tzitzis with and without tzitzis isn't inherently contadictory - tcheiles is an additional assay, so wearing one pair of tzitzis with and one without isn't a problem.

  • Maybe it is a problem. How do you know? If the person who is wearing techeiles holds its true techeiles, then by wearing a Tallis without techeiles they're being mevatel the mitzvah of techeiles, no?
    – robev
    Apr 27, 2022 at 10:58
  • 1
    @robev that's true even if he isn't currently wearing one beged with blue
    – Double AA
    Apr 27, 2022 at 11:09
  • @DoubleAA but we're discussing when he is?
    – robev
    Apr 27, 2022 at 11:56
  • @robev we're discussing issues arising from his wearing both at the same time, which yours apparently isn't.
    – Double AA
    Apr 27, 2022 at 12:06
  • @DoubleAA I'm saying maybe wearing a Tallis without techeiles is a bittul mitzvah even if they're wearing a Tallis with techeiles. Can they wear a Tallis without any tzitzis if they're wearing a Tallis with tzitzis? I don't think so...
    – robev
    Apr 27, 2022 at 12:42

Yes, you can!

One example is Rav Belsky who only wore it on his tallit katan and never on his tallit gadol.

I guess it depends if you hold it is a chumrah/hiddur or a chiyuv.

If it is a chiyuv, then you can only wear techelet. See “Tekhelet in Tzitzit: A choice Mitzvah or an Absolute Obligation” by R Samuel Ariel.

If it is a chumrah or hiddur , then you can wear only white if you don’t have techelet in that moment or not enough money etc. See “The Definition of Nullifying a Mitzvah” by R Yehuda Rock.

Most people who start wearing techelet hold is a chumrah and do both at the same time for a while until they have enough money to fully switch to techelet.

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