I bought this for summer and winter activity.  In the summer, on long motorcycle rides, I have to keep my arms covered or I'll burn.  I know I'm supposed to wear a leather jacket for fall protection but it's just too darn hot.  This long sleeve shirt is light, keeps me cool and prevents me from getting sick from burns.  I also like wearing this under my rain gear, when riding on warm rainy days, helps with the sweating.  It's also a very good first layer (next to skin) when gearing up for cold weather.  Layering your gear is a must.  I just wash it on the gentle cycle and hang dry.  It's still looks brand new, it's a well made quality product.