Evazote pads - why? in The Gear Critic Posted February 24, 2011 I sent this email to MEC a while ago and got no response. Has anyone noticed this before? Everyone raves about Evazote, but the numbers don't add up. I was thinking about getting one of your Evazote foam pads. However, looking at the specs, I'm confused. The 1cm Evazote pad is an R-value of 1.6, so warmth per thickness is R1.6/cm. But the other two thicnkesses, 0.5cm (R0.66)and 1.5cm R2.06), are both ~R1.35/cm. Is one of those in error? Looking further, I noticed that the Evazote pads are very heavy - 175g for the very thin Bivy pad. At 220g, the Blue foam pad offers an R value of 1.36: twice the warmth, and only 25% more weight. Two blue foam pads would get me an R-value of 2.72, at 2cm thickness, and only 440g. The Winter Evazote pad is over 2x the cost, 525g, and only R 2.06. So, what do the Evazote pads do? I always hear that it's some kind of great material, but they just appear to be heavy, cold, and expensive. They are somewhat warmer for a given thickness, but a cheap Ridgerest or self-inflating pad beats them handily there as well. Further investigation showed that Granite Gear sells Evazote pads with 1/2 the weight per thickness. Thier 150x50x0.95cm pad is only 156g, to your 1cm pad's 350g. This makes me wonder if your numbers are right, because while they don't offer R-value data, they claim that Evazote is 1/2 the density as your specs show.