Just wrapped up a 2-night winter camping trip in Algonquin during the polar vortex, temps dropped to around -27°C. I brought my Nemo Switchback to use for added support but wanted to see if the Therm-a-Rest XTherm alone would be enough. Turns out, it absolutely was. I slept warm wearing just Uniqlo thermal pants and a wool sweater. The pad is a bit noisy, but honestly, I didn’t notice it. 100% worth the money.