Just got my cap today, which replaced my old Columbia summer cap which finally fell apart after years of service.  I had bought a Headsweats cap to replace it initially, but despite the mesh appearance of the cap from online sources, it turned out to be a little too warm for summer use.  I noticed the sweatband produced a lot of warmth, and the meash did not seem to breathe well.  This Swift Sun Hat will surely solve that problem and be more like my old Columbia cap.  The Swift Cap is very light in construction and comfortable on the head.  The mesh is real mesh...lots of ventilation and air circulation.  The adjusting clasp in the back is a bit unusual, and I do hope the little plastic locking mechanism doesn't break somewhere down the road.  I don't see why it should, unless you forcefully play with it for some reason.  Once the cap is placed on the head, the clasp device should be stationery and not subject to any forcing jostling around, which might ultimately weaken the plastic knob.  I think this is going to be a great cap for warm weather use.