3M™ Speedglas™ Sweatbands are hygienic replacement parts designed for 3M™ Speedglas™ Welding Helmets.3M™ Speedglas™ Sweatbands are hygienic replacement parts designed for 3M™ Speedglas™ Welding Helmets. Replace when worn or unhygienic. Available in leather, towelling or fleece. Replaces worn or damaged parts. Helps ensure you get the correct level of comfort and protection. For maximum safety and comfort, regularly check your equipment for worn or damaged parts.