Anyone got any views on the Castelli Mortirolo windstopper or Assos itiburu 4 jackets? Castelli one looks more of a 'jacket' and the Assos more of a thicker jersey. I rarely get cold on the bike, even at 0-5 degrees....any thoughts on the above for a good winter staple? This isn't meant to be an Assos vs Castelli brand debate ..trust me !

I use the Castelli Mortirolo and very happy with it. Typically when the temperature is 0-5C a base layer and Mortirolo is sufficient.
The positives are: great wind protection, reasonable in light showers, good side vents when going uphill and high collar.
It looks like a jacket but wears well as a jersey. Very comfortable on 5 hr rides.
Have no experience with Assos.

thanks man , duly ordered for £90 from Evans, seems like great value

ordered whilst 'in stock' 5 days passed and I chased - not in stock with EVANS UK, what a croc! I could trade up if I wanted!!! what a joke