This lightweight backpack is perfect for all activities, including running, cycling, mountain climbing, and hiking! Its slim design fits the body, making it easy to move and run comfortably! Product Features: ・Lightweight & Comfortable Fit: The design closely follows the body, reducing bounce and providing stress-free use even for extended periods. ・Highly Breathable Mesh Structure: The back and shoulder areas are made of mesh material, preventing stuffiness even when sweating. ・Water-Repellent Material: Protects your belongings from light rain and sweat. ・Reflective Logo: Provides safety during nighttime running and cycling. ・Excellent Storage Capacity: Can securely store smartphones, water bottles, energy gels, and more. Product Information: Body Color: Black Material: Nylon Country of Origin: China Water bag is not included. This unisex design is suitable for all genders and is recommended for everyday jogging, trail running, and commuting rides.