NoSweat has developed disposable liners for hard hats that absorb sweat instantly.
NoSweat® Liners for Hats, Visors, Helmets, and Hard Hats
NoSweat® Hat Liners: 25-Pack
3-Layer Winter hard Hat Liner - Sherpa
Disposable Hard Hat Liners From: NoSweat
Westex Ultrasoft FR Cooling Hard Hat Liner Neck Shade By, 53% OFF
The Fabricator - Page 226
NoSweat® Performance Helmet Liners
Management - Page 29
NoSweat disposable liners keep heads dry in hard hats
Management - Page 29