A turbine blade (30) is disclosed. The turbine blade may have an airfoil (32) extending from a first surface (44) of a turbine platform (34). The turbine blade may further have a first side pocket (74) of the turbine platform that is configured to substantially entirely house a first moveable seal (86) between a forward wall (78) of the first side pocket and an aft wall (80) of the first side pocket. The first side pocket may have a convex surface (130), extending between the forward wall and the aft wall, and a concave surface (128). The first moveable seal may be configured to be housed substantially entirely within the pressure side pocket. The turbine blade may also have a second side pocket (98) of the turbine platform configured to receive a portion of a second moveable seal.
