Fenix ARB-L18-4000U High-Capacity USB Rechargeable 18650 Battery - 4000mAh Socks Lay-flat hood design offers flexibility—use

Lay-flat hood design offers flexibility—use flat for comfort or cinch for added warmth

5" H x 4" Width x 1

Odor-Resistant & Moisture-Wicking: Alpaca fiber keeps your feet dry and fresh

Designed for those who demand the best in warmth and style

Fenix ARB-L18-4000U High-Capacity USB Rechargeable 18650 Battery - 4000mAh Socks Lay-flat hood design offers flexibility—useThe Fenix ARB L18 4000U High Capacity 18650 Battery boasts a built in USB C charging port and a top of the line 4000mAh rating, ensuring, convenience, top notch performance, and dependability. With built in safeguards such as short circuit prevention and multiple protective layers, along with a button top design perfect for various Fenix LED flashlights, this rechargeable battery series is the ideal option for superior lighting capabilities. The Built