Covering the Hair During Prayers
Question :

Is it permissible if sometimes a bit of hair shows during prayer from underneath the headscarf of a woman?

Answer :

Women must cover their hair entirely during prayer; the prayer is valid if she noticed after the prayer that a bit of hair was not covered during the prayer.

Prayer
Question :

Is it permissible to offer prayers without a shirt?

Answer :

Yes, it is permissible.

Covering the Head
Question :

Is it obligatory to cover our head when offering prayer?

Answer :

It is not obligatory for men to cover their heads during prayer.

Perfume During Prayer
Question :

Is my prayer valid if the perfume that includes alcohol just touches my clothes?

Answer :

Alcohol is Najis if it causes intoxication and the prayers is void when the clothes become Najis with alcohol or any other kind of Najasah. Yes, if the person does not know that alcohol is Najis, then the prayer is valid.

Najis Clothes During Prayers
Question :

Is it permissible to keep a Najis cloth, which has become Najis due to blood, urine, or semen, etc., in a pocket while offering prayers?

Answer :

Yes, it is permissible to do so.

Najis Item
Question :

Is it possible to pray if there a najis cellphone or handkerchief in the pocket of one's clothing?

Answer :

Yes, it is permissible and the prayer is valid in the said case.

Prayers
Question :

If someone prays with some sweat on his body and clothes during prayer, is there any objection to that?

Answer :

No, it is permissible.

Leather Belt
Question :

Can I pray with my leather belt?

Answer :

If the animal is slaughtered in a non-Muslim country then its leather is Najis unless the slaughterer was a Muslim in that country. Praying while wearing Najis things invalidates the prayer.

Leather Jacket
Question :

Is it permissible to wear leather jackets during prayers?

Answer :

If the leather was from an animal that was not slaughtered in accordance with the Sharia, then wearing it during the prayer invalidates it.

Leather Wallet
Question :

Is it permissible to keep a leather wallet in a pocket while offering prayers?

Answer :

Based on an obligatory precaution one should not carry a leather of any animal that was not slaughtered in accordance with the Sharia during the prayers.

Leather Belt
Question :

I have a belt that is made from natural leather. I have already prayed a few times while wearing it; do I need to repeat those prayers?

Answer :

If you offered your prayers with the leather belt out of ignorance then your prayers are valid. If you prayed out of forgetfulness of the law then they are invalid based on compulsory precaution.

Cat's Hair
Question :

If someone has cat's hair on his clothes can he offer the prayers with those clothes?

Answer :

The prayer is invalid if there was cat's hair on the person's clothes based on compulsory precaution.

Cat's Hair
Question :

What is the ruling regarding cat's hair? Is it tahir so long as I do not know it to be najis? And can I pray while I have cat hair on my clothes or body?

Answer :

Yes, the hair of a cat is regarded as Tahir unless it is known to have become Najis. But the prayer is invalid based on an obligatory precaution if the individual has on his body or clothes any part of an animal whose meat is impermissible to eat - like a cat - even if it is hair or fur.

Earrings
Question :

Are we allowed to pray wearing earrings? If we pray wearing earrings is our prayer valid?

Answer :

It is prohibited to wear the earrings for men if it was to imitate women with the intention of femininity, and the prayer is valid.

Gold in a Pen
Question :

If there is gold on a pen, can I carry it in my pocket and pray with it?

Answer :

Yes, it is permissible to carry it, and carrying it during the prayer does not invalidate it.

Gold Tooth
Question :

If a man has a gold tooth, is his prayer valid?

Answer :

It is permissible to have a gold tooth if it is not conventionally considered as beautification. If it is considered as beautification, then based on an obligatory precaution one should refrain from having one and the prayers with it is invalid.

Najis Clothes
Question :

If time is short and I know my clothing is najis, should I make the dress tahir and then make the prayer up afterwards or should I just ensure that I perform the prayers first so as to not make it qadha and then wash my clothes?

Answer :

If the only clothing available is najis, offering the prayer in such clothing is valid in cases of cold weather or similar necessities. If it can be taken off, the prayer should be offered twice, once with it and once while naked, based on compulsory precaution.
The mentioned necessity rarely occurs in our time since making use of a covering material during prayer is easily done. If not usual clothing, it can be anything like sheets, blankets or similar things as long as the private parts (as defined by the Sharia) are covered for the males and all parts of the body that must be covered for females are covered.

Nail Polish
Question :

Can a girl still pray while she has colored nail polish on fingers and/or toes?

Answer :

Having nail polish is permissible during the prayer if it was applied after wudhu or ghusl. It prevents water from reaching the nail so it invalidates wudhu or ghusl if it was applied before performing any one of them. It can be applied on some of the toes that are not wiped during wudhu.