We present a new MAC protocol for networks of devices. We specifically target certain applications. To cater for this setting, we introduce a new concept. This concept is instrumental to improve performance in these network scenarios. We build a proof of concept implementation of the new mac protocol. We specifically present a protocol model and formulate the mathematical framework to study the performance of a network of devices following the new MAC. Comparing the new MAC against main contention-based MAC protocols, we show that it outperforms pure Aloha and 1-CSMA. As traffic increases, the energy savings achieved by the new MAC against CSMA protocols increase, showcasing its capability to scale.