an improved fastener assembly for reclosable plastic containers is provided . the assembly includes a male closure element having a male base member which is elastically deformable and resilient and a barb element extending substantially perpendicularly therefrom . a female closure element has a base with a substantially c - shaped track disposed thereon . the c - shaped track is constructed and arranged for selective engagement with the male closure element . the female base member is also elastically deformable and resilient . at least one of the base members has a curved exterior surface which deforms when sealing pressure is applied , thereby facilitating sealing of the fastener assembly to reclosable plastic bags by correcting for variations in pressure , temperature , and angle of the sealing bars .