Allegro supplied air, respirator welding helmets provide eye, face and head protection in welding applications. They feature Dupont, super tough, flame retardant, nylon construction & shroud covers to resist extreme heat / cold environments without deforming or cracking and for preventing arc burns, respectively. Further, these shields offer cover plate ejection systems, allowing easy cover plate changing and have permanent outer coating to protect eyes. They include Pera-lok ratchet headgears and an ultra-soft replaceable headband for additional comfort. Additionally, they provide four light shade modes for different visual shades and Solar Cell primary battery. Variants are available in digital, lithium powered backup for prolonged life.