Ihram

A pilgrim must enter into this state before crossing the pilgrimage boundary known as the Miqat by performing the cleansing rituals and wearing the prescribed Ihram clothing.

If the robe has been fouled by najas (نَجَس, dirty) material or has been wiped, rubbed or touched by scented liquids (intentionally), then a new iḥrām clothing must be worn, or the Umrah or Hajj will be invalid.

Aside from being as clean (purified) as they are for prayer, male Muslims are expected to cut their nails, and trim their hair and beards.

[2] It is forbidden for every pilgrim of Hajj and Umrah when in ihram to uproot, cut, break, or grind the branches of living trees in the Haramayn, the Two Sacred Places.

It is forbidden for every person in ihram to hunt, shoot, kill, sacrifice, capture, confine, destroy or abuse any animal.