The prohibition for male pilgrims during ihram includes covering the head with anything that directly touches and covers it, such as a cap, turban, headband, or hat. The Prophet (peace be upon him) explicitly mentioned the turban among the items a muhrim should not wear. If a male pilgrim deliberately covers his head during ihram, he must remove the covering and pay a fidyah, which is the same three-option penalty as for other ihram violations: fasting three days, feeding six poor persons, or sacrificing a sheep.
Sheikh Ibn Baz explained that the prohibition applies to coverings that are placed on the head and that conform to it, whether they cover all or part of the head. This includes hats, caps, skull caps, turbans, headbands, and similar items. It does not include shade from above that does not touch the head — such as an umbrella, a tent roof, a car roof, or a companion holding a garment above (not on) the head. These forms of shade are permissible without any fidyah.
Sheikh Ibn Uthaymeen made an important distinction regarding intentionality: if the head was covered accidentally (such as a garment falling on the head during sleep, or being pushed in a crowd and having the ihram cloth slip over the head), the covering should be removed immediately and no fidyah is due. Fidyah is only required for deliberate covering. He also noted that carrying items on the head (such as a heavy bag) is a matter of debate — some scholars considered it a form of covering, while others did not, as the purpose is carrying, not covering. This ruling applies exclusively to men; women are required to cover their heads during ihram and at all times.