Answered by Ustadh Tabraze Azam
Question: Assalam alaykum,
Is it permissible during Ihram to stitch the lower garment in the middle with the intention to cover the private parts?
Answer: Wa alaikum assalam wa rahmatullah,
Generally, tying the lower garment (izar) when in a state of pilgrim sanctity (ihram) would be deemed improper and disliked because it resembles stitched clothing.
[Shurunbulali, Ghunyat Dhawi al-Ahkam fi Bughyat Durar al-Hukkam (1.221/241)]
Please also see: Wearing Stitched Clothing in Ihram: What Kind of Expiation is Due?
And Allah Most High alone knows best.
Checked & Approved by Shaykh Faraz Rabbani