Jumpsuit by Oasis, Done in one, V-neck, Concealed placket, Belted waist, Side pockets, Relaxed fit, For a slouchy silhouette. 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.