Hi Frankie,

If your looking for a wind shell made from natural fibres then Ventile of Cotton Garbadine is possibly what your looking for,

http://www.hilltrek.co.uk/acatalog/copy_of_Braemar_Single_Ventile_Windshirt.html

http://www.west-winds.net/ventile_jackets.htm

or the SAS smock from

http://www.sasskit.co.uk/