Is there a specific garment for ihram?

There is no specific garment for ihram in the case of women; rather a woman may wear whatever she wants, except that she should not wear the niqaab or gloves. The niqaab is that which is worn over the face, in which there is a hole for the eyes; the gloves are that which is worn on the hands. 

In the case of men, there is a specific garment for ihram, namely the izaar (lower garment or waist wrapper) and rida’ (upper garment). He should not wear a thobe or pants or headgear or burnoose or khufoof (leather slippers). End quote. 

Majmoo’ al-Fataawa by Ibn ‘Uthaymeen, 22/13