Holster mechanism techniques are described. In one or more implementations, an apparatus comprises a holster configured to secure a device, a hood connected to the holster, and a locking mechanism. The hood comprises a biasing portion configured to receive a force to cause the hood to move between a closed position and an open position. The locking mechanism comprises a first locking portion and a second locking portion configured to engage the first locking portion to secure the hood in the closed position or the open position.