went hiking yesterday in the white mountains in NH. Hiked up Mt. Lincoln and went across the ridge trail to Mt Lafeyette. Man I had two mid weight fleece layers and a shell, I was like no way will i need all of this. Well, I wound up wearing it all!! There was still snow and ice up there and on the ridge line trail above the tree line it must have been like 30 degrees with the windchill. Anyway, I brought my rc3 dt with me, didnt wind up needing it for anything but I tell ya its a really cheap insurance policy. If anything happens to you way up there and your not prepared, you are totally screwed. the rc3 is so light and small I didnt even notice it was there in my pack all day.