A valve for an inflatable device includes a first region configured to seal to a fluid impermeable wall of a bladder of the inflatable device, a cap including a rim, and a seal. The base includes a second region that defines an orifice for exhausting fluid from an interior of the inflatable device, the second region configured to provide a sealing surface. Further, the rim can include a generally circular peripheral region including at least one rib located about an underside of the peripheral region and a cavity defined in part by at least one wall located radially inward of the rib. The seal can include a first end region secured to the cap within the cavity between the at least one wall and the at least one rib and a second end region configured to freely move with the at least one first end region secured to the cap.