“Great for high activity”

“I bought this jacket for running and cycling. Based on other brands of technical clothing I've purchased, I've always needed an extra small. When I received the extra small Mammut jacket, I was concerned it wouldn't fit, as it looked teeny tiny. It does fit, although I'd prefer one size larger, as there is not much room for layering and bulk. The arms seem to be the right size, so perhaps the fit of the jacket is just supposed to be highly contoured. If you prefer a more relaxed fit, order one size up. The jacket breathes well and looks nice.”