A Pretty White Dress: Kaia x Zara Satin Effect Dress This Kaia x Zara Satin Effect Dress (£59.99) is stunning. We love the slinky silhouette and the open back. This under-£100 dress would make for a beautiful date night look, and could definitely be worn to a hen party if you're getting married. Image Source: zara.com Kaia x Zara Satin Effect Dress £59.99 from zara.com Buy Now