Whicker - The Ultimate Riding Hat Liner. Make stains and odours a thing of the past. Protect the inside of your ridding hat with our unique Hydrophobic reusable hat liner, designed especially for riding hats. Soft to the touch, hypo-allergenic, breathable and environmentally friendly. The no glue liner sits neatly into position without altering the fit of your hat. Replace weekly, fortnightly, or monthly, depending on your riding activity.