But fear not - there is plenty to explore...
All that and music too? The Bern Hard Hat Audio Knit Liner is a fleece liner for the Hard Hat series of helmets that includes Bern 8tracks® 40 mm drivers.
Hand-sewn 360˚ knit
Includes removable vent cover
Includes Bern 8tracks® speakers with 40 mm drivers
Fits Bern Hard Hat Helmets