I have been wearing my Rab Vidda jacket all year round for about 3 years now, and it's still performs 100%, and that's saying something since I live in rainy rainy rainy Scotland! It is light enough to stuff in your sack and wear in Summer yet also ideal for keeping the rain, wind and snow out through Winter by just wearing insulation underneath. The Vidda jacket is a better length for hillwalkers too (unlike the Latok Alpine for example, which is shorter and geared more towards climbers). Rab is a UK brand so the size is correct (no need to refer to confusing size guides for UK shoppers). I love this jacket, it is my one essential piece of kit. When it finally gives up on me I'll just buy another one...maybes in a different colour.