No Shoulder Strap. The tomtoc Defender A42 Laptop Shoulder Messenger Bag is designed specifically for 15 inch MacBook Air laptops. Crafted from durable polyester material, this dark gray bag offers both style and functionality. The water-resistant exterior ensures your device stays protected in various weather conditions, while the padded interior provides added security. Perfect for on-the-go use, this shoulder/messenger bag combines practicality with a sleek design, making it a must-have accessory for any tech-savvy individual.