A ridged and shaped foam back makes for a comfortable carry. The straps also use foam. Cut outs and mesh on both help with heat control. And there’s a whistle on the chest strap!
I've riding and racing bikes since I was 12, which was a long time ago now! From the days of steel, wool and toe-clips, to carbon-fibre, lycra and clip-less, it's been an adventure on and off road, with a bit of track and touring as well.
There's nothing that can't be made better with a bike ride!