- Ribbed Halter Neck Backless Top - Soft & Medium weight stretch Rib Knit - Women's top with very soft stretchy fabric. Style Number: BT5505 Fabric Details: 95% Polyester, 5% Spandex It is really comfortable and fits your body perfectly. Halter neck crop style makes you more sexy and adorable. Perfect to wear in date, party, and going out. 95% of customers are satisfied with its softness, fit, and easiness to match.