Abstract: A vest having a head aperture for placement around the neck of a wearer, wherein a circumferential seal of flexible elastomeric waterproof material is welded to the head aperture, the vest further comprising an adjustable releasable fastener secured to opposite sides of a substantially radial slit extending through the seal, the slit and fastener enabling the seal to be adjusted and secured to accommodate wearers of differing neck circumference, characterized in that the circumferential seal is an annulus, welded to and in the same plane as the vest, and having a flexibility, resilience and width such that the seal self-conforms upwardly to the neck when fastened, forming a waterproof contact band.