The 3M-SecureFit-400 goggles have frameless lenses and fixed-length sides. This innovative design allows for greater comfort and safety of use and wearing. The side panels use 3M Pressure Diff usion Temple technology, which helps to distribute the pressure above the ears, thus increasing user comfort for workers in a wide range of areas. Anti-fog treatment 3M ™ Scotchgard ™. Can also be used in combination with ear muffs. Removable foam seal helps keep debris out of the eyes while providing comfort and cushioning.