Hi CityBoyGoneCountry,

A lightweight 4 season shelter is a tall order to achieve in the design compromise as the very lightest geodesic shelters will be around 2.8 to 3.2 Kg and are pretty bulky. A very specialist lightweight tent such as the RAB Summit Extreme Tent at 1.6Kg are only really usefull in cold to very cold conditions being constructed from a single skinned breathable material.

If you could specifiy what conditions you are likely to encounter e.g. Temperature and Wind speed, this would make a recommendation a lot easier.

If you wanted to reduce bulk then an equivalent full Down bag compared to the MEC Hybrid Sleeping bag would cut the bulk size down by at least 40 percent but again the pros and cons of using a full Down bag will depend on the conditions you are likely to encounter.

I am about to use a Alpkit Down Jacket in conjuction with 460 gms Pipedream Elephants foot design Sleeping bag.



Hopefully this should be useable to -5C to -10C Degrees.