Ferei AA Battery Box (HL40II) cf-size-us-10 support and pressure relief in

support and pressure relief in footwear designed for outdoor sports such as running (racing)

evenly dispersed beam that illuminates the path ahead

These 15 miles of single track trails

making it ideal for running under intense sunlight

Organic Caffeine (Caffeinated flavors only)

Ferei AA Battery Box (HL40II) cf-size-us-10 support and pressure relief inAA battery pack, which can be used with HL40II head torches (AA and chargeable versions compatible). The waterproof box can hold 3x AA batteries for a fast swap during races. Also ideal for overnight or multi night runs. Specifications Require 3x AA batteries (not included) Compatible with Ferei HL40II and HL40AAII head torches Weight 50g without battery