Jack Wolfskin says about the Eclipse III
The ECLIPSE III is a simple, free-standing 3 person dome tent made predominantly from recycled materials.
On each side, there's an entrance with a vestibule and a window. This makes it very easy to ventilate the tent. With the entrances closed, the two air vents in the roof allow a flow of fresh air into the inner tent. There are four internal storage pockets to stash small items.
The free-standing dome design requires minimal pegs and guylines - a very practical feature when pitching the tent on very hard ground. In summer, the inner tent can be pitched alone, without the flysheet.