Our cell phone sleeve tucks right into your jacket pocket or attaches with a carabiner to your backpack. Insulates your phone and battery to extend battery life in the cold. RDS certified down insulation A nylon outer material that is soft to the touch and water resistant. Fits almost all cell phones and measures 4” x 7.5”. Carabiner for attaching to anything you need to. Credit card/key pocket inside. Comes in 13 different colors.