Midi dress by Oasis, Daytime dressing made easy, High neck, Self-tie waist belt, Side hem splits, Regular fit, Just select your usual size. Opening its first store in 1991, Oasis has gone on to become one of Britains most popular high-street brands. Expect vibrant prints and plenty of colour across a collection of dresses, tops and tailoring, plus bags and shoes for all your accessory needs the add-to-bag potential is real.