• 【Ergonomic Vest-Style Stability】Features three adjustable chest straps compared to conventional two-strap designs, effectively reducing bounce during high-frequency running and providing enhanced stability.
• 【Lightweight Honeycomb Breathable Construction】Constructed with honeycomb mesh shoulder straps and large-pore back panel for accelerated sweat wicking and heat dissipation during extended wear.
• 【Dual Hydration System】Includes front dual bottle compartments for quick access and rear hydration bladder compatibility with hidden tube routing for comprehensive water storage solutions.
• 【Multi-Directional Reflective Safety】Incorporates reflective strips on shoulders, front, and back surfaces, plus integrated high-frequency whistle on right shoulder for enhanced visibility and emergency signaling.
• 【Multi-Compartment Storage Design】Features zippered main compartment for gear storage, side bottom pocket for accessories, and rear elastic cord system for pole attachment to accommodate trail running requirements.

Specifications:

• Material: Polyester, Four-way Stretch Fabric
• Capacity: 5 L
• Hydration Compatibility: Double Water Bottle Compartments, Compatible with 2L Water Bladder
• Chest Strap Layers: Three Layers
• Shoulder Strap Design: Wide Shoulder Straps
• Back Panel Material Structure: Honeycomb Breathable Mesh
• Safety Features: Reflective Mark, High-frequency Survival Whistle
• Applicable Chest Circumference: 78-92 cm
• Main Compartment Volume: 1.5-2 L