Praise be to Allaah.
The scholars are agreed that it is permissible for women to wear and
use pure silk, and that it is haraam for men to do so, because of the hadeeth of ‘Ali
ibn Abi Taalib (may Allaah be pleased with him), who said that the Prophet
(peace and
blessings of Allaah be upon him) took a piece of silk in his right hand and a piece of
gold in his left, held them aloft and said: “These are haraam for the males of my
ummah and permitted for the females.” (Reported by Ibn Maajah, 2/1189).
Abu Moosa (may Allaah be pleased with him) reported that
the Prophet
(peace and blessings of Allaah be upon him) said: “Gold and silk
have been permitted for the females of my ummah and forbidden for the males.” Indeed,
a stern warning has been narrated concerning this matter, as was reported by al-Bukhaari
(5853) and Muslim (2069) in the hadeeth of Ibn ‘Umar (may Allaah be pleased with them
both), who reported that the Prophet
(peace and blessings of Allaah be upon him)
said: “Silk is only worn in this world by the one who will have no share of the
pleasure of the Hereafter.” Anas (may Allaah be pleased with him) reported that the
Prophet
(peace and blessings of Allaah be upon him) said: “Whoever wears silk in
this world will not wear it in the Hereafter.” (Reported by al-Bukhaari,
5832).
The scholars allowed men to wear silk in certain
exceptional circumstances where there is shar’i evidence to support this, such as
Muslim combatants in war who are allowed to wear silk in order to show off and annoy the
enemy, which is a kind of psychological warfare. People who are sick may also be permitted
to wear silk to relieve their suffering, as Anas reported that the Prophet
(peace and
blessings of Allaah be upon him) allowed ‘Abd al-Rahmaan ibn ‘Awf and Ibn
al-Zubayr (may Allaah be pleased with them both) to wear silk because of a skin irritation
that they suffered from. (Reported by al-Bukhaari, 10/295, and Muslim, 3/1646).
The scholars also allowed men to wear garments
containing four fingers’ width of silk, because of the hadeeth of ‘Umar ibn
al-Khattaab (may Allaah be pleased with him) who said that the Prophet
(peace and
blessings of Allaah be upon him) forbade the wearing of silk except for an area the width
of two fingers, or three or four.” (Reported by Muslim, 3/1644).
With regard to the matters mentioned in the question,
the issue is not what a thing is called but what it really is. If the item that a man is
going to wear is made of natural silk, then it is not permissible for him to wear it, no
matter how it looks or feels, and no matter whether it is a shirt, pants, socks, a necktie
or anything else. And Allaah knows best.