A flexible neck closure that is coupled to specific anchor points on the exterior back and front of a wetsuit by releasable fasteners such that a tensile force is generated in the closure when the wetsuit is worn. The back-to-front tensile forces produce a compressive seal between the flexible neck closure and the wetsuit exterior. The body of the neck closure may have an elongation that is greater or less than the elongation of the fastener. The inner surface of the neck closure and/or the exterior surface of the wetsuit may have one or more rib features for producing a localized seal.