مناسك حج - مكارم شيرازى، ناصر - الصفحة ٧٢ - Acts that are Haraam in the State of Ihram
Article ٩٦- If the towel of Ihram is long and covers the top of the foot, or the pilgrim for example puts a hot towel on the foot for reducing the pain, then these have no problem.
Article ٩٧- Whenever a man wears socks or shoes in the case of necessity of deliberately, this act has no atonement and obligatory precaution is to shear the topside of the shoe if the pilgrim forced to wear socks or shoes.
٣- Covering the head for men
Article ٩٨- Covering all of the head in the state of Ihram is Haraam for Muhrim men, and the obligatory precaution is that they do not cover even a part of the head, but covering the head with hands or with pillow during sleep, also putting the strap of bag and like that on the head are permitted. Covering the face is permitted for men.
Article ٩٩- It is an obligatory precaution not to cover the ears, too.