Close-fitting swimsuits (cut on crosswise grain) have elasticized upper edges and narrow hem. A, B: Side-front seams, elasticized back opening, and back strap with hook closure. B: Halter shoulder strap. C, D: Elasticized neckline and armholes. B, D, E, F: Elasticized leg openings. E, F: Elasticized waist. Cover-up has front/back extending into tie ends (wrong side shows), and narrow hem.