مناسك حج - مكارم شيرازى، ناصر - الصفحة ٦٩ - Acts that are Haraam in the State of Ihram
condition that pilgrim does not cover his/ her heat with that )has no problem, also it has no problem if the edges of Ihram clothing have been sown although renouncing is a precaution.
Article ٩٠- Wearing coin bag on the waist has no problem although it is sewed( coin bag is a little bag for carrying cash, coins and like that ), also wearing a belt over Ihram clothing has no problem if it is sewed or not, also wearing a wraparound even if it has made from a sewed fabric or not, but in all these cases it is Mustahab precaution that all clothing not to be sewed.
Article ٩١- Wearing truss has no problem even if it is sewed, also carrying sewed bags which pilgrims carry on their shoulders or necks and place their needed objects in them has no problem, and there is no problem if they are sewed, too.