Alpinestars GP Plus R V4 Rideknit Leather Jacket - Black / Black

The added stretch allows movement whilst the fit is perfect.

I tried this jacket on in store and from the off it was probably the most comfortable leather jacket I've had on, in fact any bike jacket.
I got on the bike with it on a day of about 20 plus degrees and even stationary the Ridenit material seems to allow that air flow and heat escape. On the move it's very noticeable how much the air flows through that material and travels around the jacket.
I'm not going to ignore the fact that the Ridenit material would do nothing on an off to protect my skin but the areas where that material is I would suggest wouldn't be a contact point with the road, I hope. The rest of the jacket looks good and I'm happy with my purchase. 1 thing to note. I own an airtech 5 and in my usual size it's very very snug when I wear this jacket over the top but it is still very new so will give in time but despite it being "airtech ready" I'd go up a size if you plan on wearing an airbag under it.
Overall this is my go to summer jacket.