VNAKIO Dog Cooling Vest with Built-in Back Fan, 3D Mesh Tactical Harness | Requires 5V power bank (not included), Tactical mesh jacket with Velcro pocket for active medium large dogs.

Active Heat Extraction: Built-in back exhaust fan combined with mesh fabric actively draws out and expels trapped body heat to cool dogs down instantly. | Tactical No-Choke Comfort: Inspired by heavy-duty tactical vests, the ergonomic, no-tightening structure ensures a comfortable, unrestrictive fit. | Power Bank Required: Features a secure Velcro pouch to hold your power bank. Must be plugged into a 5V power bank via USB to operate (Not Included). | Rugged & Durable Material: Built from ultra-durable, scratch-resistant fabrics to withstand daily training. (Vest only, leash is not included.) | For Medium & Large Dogs: Fully adjustable straps and quick-release buckles ensure a perfect, secure fit for various active medium to large breeds.