Backless Navy Mermaid Prom Dress With Spaghetti Straps on Luulla Trumpet Mermaid Spaghetti Straps Sweetheart Sequined Prom Dresses Angrila Zapakasa Women Navy Prom Dress Mermaid Spaghetti Straps Pleated Corset Zapakasa Women Navy Mermaid Appliques Prom Dress Spaghetti Strap Satin Sexy Mermaid Dark Navy Spaghetti Straps Sparkly Long Party Prom Dresses. This dark navy trumpet dress features delicate spaghetti straps and a figure hugging silhouette that flares elegantly at the hem, creating a timeless mermaid shape. Designed for prom seeking a sophisticated and flattering look, it combines refined tailoring with graceful movement for a polished presence at any prom occasion.