بِسۡمِ ٱللهِ ٱلرَّحۡمَـٰنِ ٱلرَّحِيمِ
وَٱللَّهُ جَعَلَ لَكُم مِّمَّا خَلَقَ ظِلَـٰلاً۬ وَجَعَلَ لَكُم مِّنَ ٱلۡجِبَالِ أَڪۡنَـٰنً۬ا وَجَعَلَ لَكُمۡ سَرَٲبِيلَ تَقِيڪُمُ ٱلۡحَرَّ وَسَرَٲبِيلَ تَقِيكُم بَأۡسَڪُمۡۚ كَذَٲلِكَ يُتِمُّ نِعۡمَتَهُ ۥ عَلَيۡڪُمۡ لَعَلَّكُمۡ تُسۡلِمُونَ (٨١)
It is Allah who made out of the things He created, some things to give you shade; of the hills He made some for your shelter; He made you garments to protect you from heat, and coats of mail to protect you from your (mutual) violence. Thus does He complete his favours on you, that ye may surrender to His will (in Islam). (81)
Muslim Helmet, 18th century iran, courtesy:http://www.flickr.com/photos/mharrsch/117259144/
Siraat-e-Mustaqeem 
