"Muslim professor Mustafa Umar explained... that there is 'nothing intrinsically wrong with wearing nail polish'..."

"... the real issue is that this substance forms an impermeable barrier over the nails preventing water from getting underneath."

For years, women have been required to either remove and reapply polish for prayers every day, or wait to wear it during the week they have their period - when they're not allowed to pray.

Solution: "Breathable" nail polish.