The hard bag is dustproof, waterproof and shockproof to protect your mouse from impact and friction at travel. It is replacement for Logitech MX ERGO advanced cordless trackball gaming mouse. Features: Hard EVA material, shockproof, dustproof and waterproof. Shockproof with foam, protect your favorite device from bumps and scratches. Lightweight and compact, suitable for travel carry. Portable belt and smooth zipper for easy opening and closing. Replacement for Logitech MX ERGO advanced cordless trackball gaming mouse. Specifications: Material: EVA Color: Inner: Grey Outside: Black Item Size: 150 * 125 * 65mm / 5.91 * 4.92 * 2.56in Package Weight: 76.5g / 2.7ounces Package Size: 150 * 125 * 65mm / 5.91 * 4.92 * 2.56in Note: Only a hard bag, the mouse in not included. Package List: 1 * Mouse Bag