Carrying cases (e.g., for a computer mouse) comprising a pad and a fastener (e.g., a zipper) around the perimeter of the pad that may form a mouse pad when the fastener is unfastened, and may be folded along a dimension and the fastener fastened to form a storage pouch. Such carrying cases may include a rim to prevent a mouse from sliding off of the mouse pad, an attachment mechanism that may include a strap, a snap button, or both, or a combination thereof. Embodiments are neoprene having a thickness of 1 to 5 mm, have a fold dimension between 15 and 30 cm, or both. The fastener may have a pull tab located at one end of the fold when the fastener is unfastened and at an opposite end of the fold when the fastener is fastened. Pads may be round, oval, or rectangular with rounded corners.