  This paper investigates the feasibility of mmWave frequencies for personal
networks of wireless wearable devices in enclosed settings (e.g., commuter
trains, subways, airplanes, airports, or offices). At these frequencies,
specular reflections off surfaces are expected to contribute intended signal
power and, simultaneously, to aggravate the interference at the receivers.
Meanwhile, blockages by obstacles and people---including the individuals
wearing the devices---are expected to shield receivers from interference. With
the aid of stochastic geometry and random shape theory, we assess the interplay
of surface reflections and blockages for dense deployments of wearable networks
equipped with directional antenna arrays in relevant indoor settings.
