The High Frequency's feature an actual sewn in inner short rather than the a detachable one. And very comfy around the nether regions they are too, courtesy of a multi-density pad.
This construction helps give a 'hardly there' feeling when riding, but that's also due to the waist adjustment, which pulls the shorts closer into your back than the usual tighten-it-across-the-stomach operation.
The fabric is light, with a soft, almost silky, feel, but despite a decent
amount of venting, the shorts got very warm very quickly. We wouldn't rate their chances against thorns either. That urbane smoothness would make them good around town though.