Mountain Hardwear Chillaction Short Sleeve -- For the days you want to bring the comfort of home to far-off places, the Chillaction Short Sleeve is the next best thing when you're curled up at camp. MHW's Dream Knit fabric hugs skin with a super soft peached interior while offering plenty of stretch for full range of motion when you're making big moves. Rated UPF 30, it protects skin for hours under the sun.