Wearing silk for the adult male is forbidden, unless for an excuse.
Hut Hayfa (G. p. H) said:
"The Prophet (P. B. U. H) forbid us to drink in gold or silver vessels or to eat of them, and to wear silk or to sit on it".
[Al-Bukhari, Vol. 5, The Book of Dress, Chapter 26/5499].
Both types of silk, qaz (that which the silkworm cut through and left alive) and ibreesam (that which the silkworm died inside and then was removed from) are equally forbidden.
Also, both types of silk fabric, dihaj (brocade (A thick silk fabric) and sundus (sacrament (A thin silk fabric), are forbidden.
The reason for this is perhaps what Al-Imam Al-Ghazali (G. p. H) said about it: "Wearing silk is effeminate and is not appropriate to manhood".
Fabric made of equal amounts of silk and another substance is not forbidden, nor that which is embroidered, patched, stuffed, or sewn with pure silk unless the weight of silk is equal to the weight of the fabric itself Trimming with silk is judged according to the custom of one's equals.
Ibn Abbas (G. p. H) said: "The Messenger of Allah (P. B. U. H) forbade garments made of pure silk, but there is no harm to trim with silk or to bias the edges
of garments with it".
[Abu Dawood, Vol. 4, The Book of Dress, Chapter 12/4055].
A male is forbidden to use fabric of pure silk, such as sitting on or supporting one's back with something made of it without a barrier.
It is also forbidden to sit beneath it(Such as a mosquito net made out of silk) (as in a canopy).
However, the bag and hook of a mushaf, the string of a rosary or key.
and the covering of the graves of prophet (P. B. U. H) s and the virtuous can be made of silk.
It is permitted to cover the Ka'ba with it, also.
It is permitted to use silk out of necessity, such as sudden danger, severe cold or heat, avoiding scabies, for a skin rash or allergy, or for covering one's awra.
Once, an alternative is available, using silk becomes forbidden.
Anas (G. p. H) said: "The Prophet (P. B. U. H) allowed Al-Zubair and Abdullrahman to wear silk because they suffered from rash"."
[Al-Bukhari, Vol. 5, The Book of Dress, Chapter 28/5501]
Forbid- ding silk is restricted to sane adult males, so if the user is a child or insane then it s not forbidden.
Women are permitted to wear silk and use it.
Ali (G. p. H) said: "The prophet (P. B. U. H) took some silk in his right hand and some gold in his left and said:
"These two are forbidden on the males of my umma (nation)".
[Abu Dawood, Vol. 4, The Book of Dress, Chapter 14/4057].
Men are forbidden to wear, or use, garments dyed with saffron, but not those dotted with it.
Anas (G. p. H) said: "The Prophet (P. B. U. H) forbade men to use saffron.
(pa:286 )
It is makrooh for men to wear, or use, garments dyed, in whole or pan, with safflower except those spotted or striped with it.
Abdullah ibn Amr ibn Al-Aas (G. p. H) said: "The Messenger of Allah (P. B. U. H) saw me in two robes dyed with safflower so he said:
"These are clothes for the unbelievers so do not wear them".
[Muslim, Vol. 3, The Book of Dress and Ornament, Chapter 4/27]
It is not forbidden nor makrooh to wear red, yellow, green, black or stripes of any color.
It is forbidden for a male to wear a gold ring. Ali (G. P. H) said: "The Messenger of Allah (P. B. U. H) forbade me to wear a gold ring".
[Muslim, Vol. 3, The Book of Dress and Ornament, Chapter 4/31].
As for silver, not only it is permitted but sunna, unless it is too extravagant.
It is best to wear the ring on the small finger of the right hand.
Ibn Umar (G. p. H) narrated: "... Then he (P. B. U. H) wore a simple ring, whereupon people started wearing silver rings too.
After the Prophet (P. B. U. H), Abu Bakr wore the ring, then Umar, and then Uthman till it fell from him in the Aris (Which is located in a garden close to the Mosque of Qiba') well".
[Al-Bukhari, Vol. 5, The Book of Dress, Chapter 45/5528]. (pa:288 )