3M Speedglas Sweatband, Woolen Cotton, 198017 [3-Pack] Features: 3M™ Speedglas™ Heavy Duty Welding Helmet G5-01 sweatband made from woolen cotton. 3-pack. The replacement sweatband made from woolen cotton, with other materials available. It is recommended to change the sweatband every month or more frequently if it becomes unsuitable for health. Suggested Industries / Usage: 9100 and G5-01 welding helmets.