The LPP is a great option for a puffy that is well sewn, has the tougher fabric in wear areas, and uses good quality synthetic insulation. It still suffers from insulation breakdown after roughly 60 full field days of use unfortunately; this drops its effective temp rating.
Its only downfall for me is overall warmth. It’s not warm enough to replace a good down puffy for truly cold static sits.
Here’s a very helpful comment from a thread I started comparing the Stone Glacier Grumann to the Kifaru LPP…
“With more than 40 different people wearing them for true comfort rating, and absolutely static use- no standing, no walking, no smacking hands together- static: approx 35-40°. This is the Grumman combined with a lightweight base layer- wool or synthetic (think T shirt weight), and a medium fleece or mid layer- think Patagonia R1, Sitka Kelvin Active, etc., and not in direct sunlight or wind. Head, neck, hands, and lower body are all taken care of- just straight jacket.
For reference those same people for absolute comfort with the Kifaru LPP get around 37-40° when new, and about 45° after around 60 days of use.”
