This dress trend paired with closed-toe flats in this color is *the* summer outfit of 2026.

      Few things are as stylish as an Elsa Hosk ensemble, and any fashion editor would agree. She frequently merges several trendy elements into one outfit with remarkable ease. The latest summer styles she integrated resulted in a simple look that I highly recommend emulating.

      To start, the summer 2026 dress trend that Hosk showcased was the sleep dress. If you're curious about why sleep dresses are being worn outside, let me clarify. The term refers to loose-fitting, unstructured summer dresses adorned with charming, vintage-inspired details like ruffles, bows, and eyelets. If you had to sleep in a dress, this style would be a comfortable choice. While they are often white (as Hosk's was), they certainly don't have to be.

      With her puff-sleeve sleep dress, Hosk complemented it with a trend in closed-toe shoes (apologies to sandals) that I want to highlight: bright blue flats. While it might seem particular, ocean-inspired shades like aquamarine and cerulean are a significant color trend this summer, and flat shoes have become a popular way to incorporate it.

      Scroll down to view Hosk's sleep-dress-and-blue-flats outfit (along with another recent appearance where she sported the sleep-dress trend) and find similar styles to try for yourself.

      **Shop Elsa Hosk's Exact Sleep Dress Outfit:**

      On Elsa Hosk: Sandy Liang Daikon Dress (£322); Saint Laurent Panier Medium Bag in Raffia Tote Bag (£1595); Chanel shoes.

      Sandy Liang is a favorite in NYC, blending childhood memories with hyper-femininity.

      **Saint Laurent**

      Panier Small in Raffia

      From Elsa Hosk to Jane Birkin, the basket bag remains a timeless summer essential.

      **Another Elsa Hosk Sleep-Dress Outfit:**

      (Image credit: GuessWhoISaw/Backgrid) On Elsa Hosk: Helsa Midi Dress With Lace in Tech Poplin (£137); Polo Ralph Lauren Logo Cotton Twill Ball Cap (£94)

      **Shop Sleep Dresses:**

      The Dôen Daphne dress features a delightful print reminiscent of 17th-century French château wallpaper, making it both elegant and effortless.

      **Reformation**

      Aurora Sleep Dress

      This ensures sweet dreams come true.

      Nightwear isn't solely for the evening, especially with styles this desirable.

      **DÔEN**

      Nessie Embroidered Striped Floral-Print Organic Cotton Mini Dress

      The charming blue ribbon trim and nautical-inspired stripes will pair perfectly with blue flats.

      **Free People**

      Dream Haze Embroidered Nightie

      Eyelet designs add a lovely touch.

      **FAITHFULL**

      Serafina Broderie Anglaise Mini Dress

      With delightful puff sleeves and a playful hemline, this Faithfull broderie anglaise mini is perfect for transitioning from cocktails to lengthy summer dinners.

      **Shop Blue Ballet Flats:**

      **Aeyde**

      Tiby Bow-Detailed Suede Ballet Flats

      The suede texture lends a gentle, tactile quality to the trend.

      **Tory Burch**

      Reva Travel Ballet Flat

      A stunning and eye-catching color.

      **Reformation**

      Blaine Flats in Cobalt Suede

      **Dear Frances**

      Balla Sock Flat

      Crafted from premium Italian mesh, Dear Frances shoes combine the delicacy of slippers with the practicality of boots.

      **MARYAM NASSIR ZADEH**

      20 Serafina Leather Ballet Flats

      Metallic undertones are a highly relevant choice for summer attire.