Thank you for viewing. This is the Chest Increase from RIDGE MOUNTAIN GEAR. ■ Brand: RIDGE MOUNTAIN GEAR ■ Model: Chest Increase ■ Condition: New, unused (I bought it, but my smartphone didn't fit) ■ Material: 210D ROBIC Ripstop Nylon (DWR water repellent) / Front pocket: Nylon mesh ■ Size: 17cm (H) x 8.5cm (W) x 3cm (D) ■ Weight: Approximately 52g This is an expansion pocket that attaches to the shoulder harness (20mm wide tape) of a backpack. It has a 3-pocket structure: main body, inner pocket, and mesh pocket. It also has a cushioned core material, so you can safely store smartphones and compact digital cameras. *Please measure beforehand to avoid the situation like me, where the item you want to put in doesn't fit after you buy it... Features... UL/Ultralight