The breathability of the shorts material is 5/5. The breathability of the liner material is 4/5. I can't compare the liner comfort because I can't wear liners, but the material feels soft. The liner is easily overruled by putting both legs through one side and tightness is alleviated by slicing the side seam up to the waist band. The ultimate solution is to cut the bottom third out and cut off the remaining elastic bands. That gives the option for an extra layer front in back or to tuck them under the waist band to suit conditions. The shorts are very comfortable without the liner. Feels great on the skin. The only sweat area is under the waistband and that can be adjusted up and down for drying. Risk of exposure is low under most conditions. It goes up for, say, somebody holding a ladder while you climb above them. It's inevitable. The excellent airiness is accompanied by a slight translucence but for shadows to be seen the backlight has to be just right and the observer very close. Maybe lighter colors would show more. But these are good at hiding the wet spots (and dried spots). I haven't had to wash them in several wearings. Impression in the front is tastefully visible; not too blatant but position and movement are evident to those who look. The pockets are good with the zippers. The only drawback is the hem material does not stretch. I've achieved more legroom by carefully cutting the threads that hold the side seams together about two inches. The good design with easy minor modifications and reasonable pricing call for high rating, I'd say 9/10 which rounds to 5/5.