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We're in some of the coldest days of the year now, let's see what keeps you warm at night.
I picked up a Trek Tk II long edition from Sea to Summit a week ago and took it out this past weekend. Overall very comfortable and fits into my backpack very well, compacting to about the size of a NFL Football. If you want temperature ratings on it I found this on their website
http://www.seatosummit.com/wordpress/wp-content/uploads/2015/08/NEW_SB_Data_chart_8_15_FINAL.pdf
I picked up a Trek Tk II long edition from Sea to Summit a week ago and took it out this past weekend. Overall very comfortable and fits into my backpack very well, compacting to about the size of a NFL Football. If you want temperature ratings on it I found this on their website
http://www.seatosummit.com/wordpress/wp-content/uploads/2015/08/NEW_SB_Data_chart_8_15_FINAL.pdf