Here's a decent review on a few of the best bags out there. There is no magic pill. I looked at these and others and ended up going for the Marmot Hydrogen for late summer/early fall backpack hunting trips for mule deer and bear. 1 lb. 8 oz. and a 29F rating. Down is the only way to go for the reasons guys have already listed. Take care of it and it will last forever. I've grown tired of buying synthetic fill bags, store it perfectly, treat it perfectly, and watch the loft go down year by year--waste of money. Instead, by the highest down fill you can--I would suggest at least 750 fill power, if not 800. I think the Hydrogen I purchased was 850 fill power. 850 or 900 fill power is ever better. It will last longer, provide a better weight to warmth ratio, compacts far more for packing, etc., etc.
Outdoor Gear Lab review of summer weight down bags: Down Sleeping Bags - Warm Weather Reviews - OutdoorGearLab
I acquired a Tarptent Rainbow a couple of months ago and at 2 lbs. 3 oz. it has a ton of room with a 40" x 88" floor and some really cool and flexible vestibule pitching options--big enough for 2 if necessary as a typical backpacking sleeping pad it 20" wide. The Rainbow has good venting as well--many tents don't have good venting and this is absolutely essential to a well thought out tent design and will keep you much more comfortable during your time in the tent. The Rainbow does not require trekking poles to set up and this is one thing that makes it 'heavier' because the trekking pole weight is obviously not included in the weight of tents that use trekking poles for support. But, I hunt all day using my trekking poles, generally coming back to camp at night. Trekking poles, however, can be used to augment the strength of the shelter in case of snow loading, etc. I know the materials Henry uses in his tents quite well as use them in my designs as well as we buy from the same US supplier, and it is tough stuff for it's weight.
Tarptent Rainbow: Tarptent Ultralight Shelters
Big fan of the Thermarest NeoAir Trekker pad as a great compromise of weight and great comfort: http://www.rei.com/product/810375/th...r-sleeping-pad
Would reccomend the 'regular' size 20" x 72" (actually measured at 75" in the 2 I own) and rolls up smaller than a 1L water bottle using the Thermarest bag: http://www.moosejaw.com/moosejaw/sho...8_10000001_-1_
Buy the 1.5L 'extra small size'. This pad fits in there just fine and it is smaller than a 1L bottle when it's in there.
In the beginning God created the heavens and the earth. Genesis 1:1
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- Shelter for Your WildSide - http://www.youtube.com/watch?v=tYwgo...&feature=g-upl