Assuming one is inside an eruv which generally permits transferring between domains on Shabbat, may one use an umbrella on Shabbat? If not, why not?

Follow-up question: What about other things that fold (e.g. strollers, portable chairs, tables, or an extendable canopy)?

Assuming one is inside an eruv which generally permits transferring between domains on Shabbat, may one use an umbrella on Shabbat? If not, why not?

Follow-up question: What about other things that fold up/out (e.g. strollers, portable chairs, tables, or an extendable canopy)?

Is it permissable to use an umbrella on Shabbat, assuming you're inside an Eruv, so there's no issue of carrying? If it is not permissible, then why is it prohibited?

Follow-up question: What about other things that fold, like strollers, portable chairs and tables, or an extendable canopy?

Assuming one is inside an eruv which generally permits transferring between domains on Shabbat, may one use an umbrella on Shabbat? If not, why not?

Follow-up question: What about other things that fold (e.g. strollers, portable chairs, tables, or an extendable canopy)?

Assuming you're inside an Eruv, so there's no issue of carrying. If it is not permissible, then why is it prohibited?

Follow-up question: What about other things that fold, like strollers, portable chairs and tables, or an extendable canopy?

Is it permissable to use an umbrella on Shabbat, assuming you're inside an Eruv, so there's no issue of carrying? If it is not permissible, then why is it prohibited?

Follow-up question: What about other things that fold, like strollers, portable chairs and tables, or an extendable canopy?