If you're looking to extend the height and inner space of your Asgard tent then the High Wall extension is perfect. Adding an extra 60cm in height all the way round your Asgard 12.6 tent.
Nordisk says:
Both the Asgard 12.6 and 19.6 can be upgraded by adding the Asgard High Wall, available in two sizes. It is easily attached to the tent by zipping the High Wall to the bottom of the tent, it is also compatible with the zip-in groundsheet (additional). The High Wall comes with 3 extra pole segments for extending both the centre pole and the two legs of the A-pole by the entrance. The Asgard High Wall offers much more headroom making it possible to stand up in most positions inside the tent, plus you can also leave in the extra poles and pull up the sides turning your Asgard into a tall tarp or parasol.
Nordisk's Asgard 12.6 High Wall is an extra that you can get to extend the internal living space significantly. It adds an extra 60cm of height all the way round your Asgard 12.6 by simply zipping on the bottom of your existing tent. It can still zip onto the groundsheet aswell, providing full coverage. This is a great way of increasing your space in a simple and effective way.
