SEATTLE (PRWEB) SEPTEMBER 13, 2018 ONOTONE, designer, manufacturer, and distributor of unique iPhone cases, is pleased to announce the launch of the Concrete Collection to the company’s lineup. The Concrete Collection is made with highly durable material. Exterior of the cases is coated with a thin layer of genuine concrete. The inside cushioned layer of the case SEATTLE (PRWEB) SEPTEMBER 13, 2018 ONOTONE, designer, manufacturer, and distributor of unique iPhone cases, is pleased to announce the launch of the Concrete Collection to the company’s lineup. The Concrete Collection is made with highly durable material. Exterior of the cases is coated with a thin layer of genuine concrete. The inside cushioned layer of the case