The Polaris Venom is a mid-weight long sleeve jersey, featuring a brushed roubaix type fabric (which Polaris call 'Thermostretch') that strikes a good balance between insulation and breathability.
That Roubaix type layer gives the Venom an inner texture that's soft and feels good against the skin for days when a base layer isn't needed, while the outer layer includes some degree of wind resistance. A reassuringly stout, full length YKK zip is used contributing greatly to the Venom's versatility.
The Tornado jacket from Polaris is a garment for cold weather cycling. To keep you comfortable on those long winter rides, the panelling on the chest and sleeves is fully windproof.
In fact the Tornado is so good at keeping the elements at bay, when the temperature does rise it becomes something of hinderance.