Best running *accessory (not strictly belts) for the basics?

Question

Elaine F · Answer

Injinji  Run Lightweight No-Show Socks: I like my toes separated when running or long walks rather than having them cramped together. Less blisters between toes too. They make compression and crew height versions as well.

Eric F · Answer

Nathan Sports SpeedDraw 2 Insulated Flask 18oz 💧: Stays comfortably strapped to your hand, and holds water + phone + keys/cards/etc.