The Chapter of Dress
Covering the private part is obligatory whether in public or in private (i.e. when you are alone).
A man must not wear pure silk if it is more than four fingers except for medical purpose, nor must he use it as a bedding sheet. A man must not wear a cloth dyed with saffron.
Also, he must not wear a shuhrah (i.e. eye-catching clothes that are unfamiliar to one’s local norms and traditions).
A man must not wear feminine clothes and vice versa. Nor must a man wear golden jewellery, yet he is allowed other than that.
 Quran: Allah says: “O Children of Adam! We have bestowed raiment upon you to cover yourselves (screen your private parts) and as an adornment, and the raiment of righteousness, that is better…” (Surah A’raaf: 26)
Sahih: The Prophet (Sallallahu alayhi was sallam) said, “Cover your private parts except from your wife or whom your right hands possess.” Recorded in Musnad Ahmad. Graded Sahih by sheikh albani
 Sahih: Suwaid b. Ghafala said: ‘Umar addressed us at a place known as Jabiya (Syria) and he said: Allah’s Messenger (Sallallahu alayhi was sallam) forbade us the wearing of silk but to the extent of two or three fingers or four fingers. Recorded by Muslim
Hasan Sahih: Narrated Suwaid bin Ghafalah: That ‘Umar gave a Khutbah at Al-Jabiyah and he said: “The Messenger of Allah (Sallallahu alayhi was sallam) prohibited silk except for two finger’s worth of space, or three, or four.”Recorded by Tirmizi who said Hadith is Hasan Sahih
 Sahih: Anas b. Malik reported that ‘Abd al-Rahman b. Auf and Zubair. b. ‘Awwam complained to Allah’s Messenger (Sallallahu alayhi was sallam) about lice; he granted them concession to wear shirts of silk.Recorded in Muslim
 Sahih: The Prophet (Sallallahu alayhi was sallam) said, “These are the clothes of the disbelievers, so do not wear them.” Recorded by Muslim
 Sahih: The Messenger of Allah (Sallallahu alayhi was sallam) declared, “Allah curses men who imitate women and women who imitate men.” Recorded by Bukhari
 Sahih: Abdullah ibn Abbaas reported that the Prophet (Sallallahu alayhi was sallam) saw a gold ring on a man’s hand. He took it off and threw it aside, saying, “Would any of you take a burning coal and hold it in his hand?” When the Messenger of Allah (Sallallahu alayhi was sallam) had gone away, someone said to the man, “Take your ring and benefit from it (i.e., sell it).” He said, “No, by Allah, I will not take it after the Messenger of Allah (Sallallahu alayhi was sallam) has thrown it away.” Recorded by Muslim
Hasan Sahih: Narrated Abu Musa Al-Ash’ari:That the Messenger of Allah (Sallallahu alayhi was sallam) said: “Wearing silk and gold has made unlawful for the males of my Ummah and lawful for its females. Recorded by Tirmizi who said the hadith is Hasan Sahih