Mi Yodeya is a question and answer site for those who base their lives on Jewish law and tradition and anyone interested in learning more. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Okay, no leather shoes for Yom Kippur (or Tisha B'Av). I always assumed if the label said ALL MAN MADE MATERIALS or 100% CANVAS or something like that, that we could trust the label. (Would they really sneak leather in? It's more expensive, right?) Has anyone asked/heard anything about this?

share|improve this question
up vote 1 down vote accepted

If it works for Chalov AKum I would Imagine It works Here too.

share|improve this answer
Certainly the logic of "trust in economics and regulation" would apply here; R' Moshe's heter for milk goes beyond that, that "knowing" counts as "seeing" with regards to the enactment on milk. For general kashrus, "knowing" is enough. So if we can apply a kal vachomer from food kashrus (and I'm correct on the metzius), should be fine. – Shalom Aug 19 '10 at 22:26
@Shalom Just to correct a misconception R' Moshe's heter for milk is not based on that, it was based on the government testing that was done on milk. These days the testing is not done, so those who drunk Chalov Akum are not relying on him, but rather on later opinions. oukosher.org/index.php/common/article/… – Ariel Jul 15 '12 at 4:40
@Ariel let's just say it's more complicated than that. R' Moshe has a series of responsa about the subject, and interpreting them is still being fought over today. – Shalom Jul 16 '12 at 6:02

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.