I got one of these as a gift, and immediately bought 3 more. I really like that it's a simple, lightweight layer, is breathable, and yet offers some warmth. This isn't a heavy fleece, but that's just the point. It's a great warmup layer for a hike on a cool morning and weighs nothing once it's hot out and you stuff it in your pack.

I have no idea how durable they will be or how well the seams/stitching/etc will last - but at this price, they're too comfy to pass up.