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Alright clo value experts, help me deduce my response from Mammut. I like their Rime Pro jacket, but had never heard of their Ajungilak insulation before (it has 100g of it evenly throughout their jacket). Sent a query to Mammut and here is the response:
"Thermal Transmittance of Textile Materials (ASTM D1518–2003)
Test Result
Intrinsic thermal resistance (Clo) : 2.488
(100gr/m2)"
How would this break down in terms of warmth compared to Primaloft One, Sport, etc?
Thanks!
Apex is spec'd at 0.82 clo/oz/square yard so you'de need 3 ounce/square yard to equal 2.488 clo
Primaloft Sport is 0.79 so 3.15 ounce/square yard
Primaloft One is 0.92 so 2.7 ounce/square yard
Thanks for the response. I don't know if my math is correct…
100g = 3.527oz
1 square yard = 0.836 square meters
3.527 * 0.836 = 2.94
3 / 2.94 = 1.02
1.02 * 0.82
Ajungilak clo/oz/yard = 0.836
Is that accurate? Making Mammut's proprietary insulation just a little warmer than Apex? Or approximately 91% as warm as PL1?
My math agrees with yours – 0.84 clo/oz/yd2 : )
I don't know why we don't all use grams, meters, and m2K/W – it would be much easier
I bet that the variation from sample to sample is bigger than the variation between average Mammut, Apex, or Sport. One is a little better but it's so fragile – requires more quilting which may actually eliminate any advantage.
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