1. 🌟 Night Reflective Elastic Band: This feature is designed for safety during nighttime outdoor activities. The elastic band incorporates reflective materials that shine brightly under light, making you highly visible to others. Whether you're jogging, cycling, or walking at night, this reflective band enhances your safety by ensuring that others can see you clearly.

2. 📏 Snap Adjustment: The product offers a convenient snap adjustment design, allowing you to customize the fit to your body comfortably. It can be adjusted within a range of 70cm to 160cm (bust size). This means it can accommodate a wide range of body sizes, making it versatile and suitable for different users.

3. 📱 Front Mobile Phone Pocket: The front of the bag features a dedicated pocket designed to hold mobile phones, including large-screen smartphones up to 8 inches in size. This pocket keeps your phone easily accessible, allowing you to check notifications, use GPS, or even capture photos without the need to remove it from the bag.

4. 🎧 Headphone Access: For added convenience, the bag is equipped with three headphone holes on the front cover. These holes are designed to accommodate various headphone socket sizes, making it compatible with different types of phones and headphones. You can enjoy your favorite music or take calls while keeping your phone securely in the bag.

5. 🛍️ Shoulder Pocket: The bag also includes a shoulder pocket, providing a dedicated space to store items like a car remote control and keys. This pocket ensures that these essentials are easily accessible, eliminating the need to rummage through the main compartment of the bag.

6. 🧰 Fixing Rope: At the rear of the bag, there's a handy fixing rope designed to secure different sizes of water bottles. Whether you prefer a smaller sports bottle or a larger water container, this rope keeps your hydration source in place, preventing it from moving around during your activities.

7. 💧 Back Pocket: Finally, the bag features an additional back pocket designed specifically for carrying a water bottle. This pocket is not only convenient but also helps distribute the weight of the bottle evenly for comfortable carrying.

In summary, this product is designed with a focus on safety, comfort, and convenience during outdoor activities, especially at night. Its adjustable sizing, multiple pockets, and thoughtful features make it a versatile and user-friendly choice for those on the go.