Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates this statement of the Prophet (peace and blessings be upon him): "When a person in the state of Ihram does not find shoes, he should wear leather socks, but he should cut them in such a way that they become below the ankles."
Hadith Referenceصحیح ابن حبان / كتاب الحج / 3788
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح: ق - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط الشيخين