RadTech has introduced a new product in its line of notebook accessories, the STM Sonic shoulder bag. Designed to hold a 13-inch MacBook or 15-inch MacBook Pro, the bag is made from Heavy-gauge PU fabric, with a water-resistant coating, and high-density internal padding for shock absorption. The internal compartment helps protect the notebook while separating it from the other items in the bag. An adjustable shoulder strap comes with swivel mounts and can double as a short handle when carrying by hand.