the Marathon Energy Running Belt is Designed for Serious Runners Who Need a Reliable Way to Carry Their Essentials. Made From Lightweight, Moisture-wicking Material, This Belt is Comfortable to Wear & Keeps You Cool During Long Runs. Its Adjustable Strap Ensures a Secure Fit, While the Expandable Pouch Provides Ample Space for Your Phone, Energy Gels, Keys, & Other Small Items. Featuring a Sleek, Aerodynamic Design, It Minimizes Bounce & Friction, Allowing You to Focus on Your Performance. Reflective Trim Enhance Visibility in Low-light Conditions, Making It a Great Choice for Early Morning or Evening Runs. Perfect for Marathoners, Casual Runners, & Fitness Enthusiasts Alike.