Sienna Midi Dress in Black Always Alice Sienna Dresses Elegant Satin, Chiffon & Fall Styles Sienna Black Sienna Black. Final Sale Not eligible for return The Sienna Dress makes a statement whilst remaining uncomplicated and minimal. Crafted from 100% premium linen with a light cotton lining. This strapless dress is secure and easy to slip on and off with an elasticised top band. Style with slides for a modern casual day look or pair with heels and jewellery for an elevated summer evening look.