Electric arc flash fires are a significant safety concern in electrical systems, especially in industrial and commercial environments. These incidents pose substantial risks to electricians and technicians working on the maintenance and installation of electrical panels. Arc flashes generate intense heat and light, resulting in both thermal and electrical hazards. This study focuses on the recently developed gloves, designed to provide robust protection against thermal hazards and arc flash incidents. These gloves are made from a yarn blend of modacrylic and aramid fibres reinforced with glass. The material is seamlessly knitted using a 10-gauge knitting machine. Additionally, the gloves are coated with flame-retardant nitrile rubber on the palm area for enhanced performance. The gloves were rigorously tested for their ability to withstand thermal, mechanical and arc flash hazards in both coated and non-coated variants. The newly developed gloves exhibited superior thermal and mechanical performance compared to 100% para-aramid-based gloves. The coated side achieved an impressive Arc Thermal Performance Value (ATPV) rating of 9.2 cal/cm2, corresponding to Hazard Risk Category (HRC) Level 2. This development exemplifies the potential of “blending and optimization” in technical textiles. By combining p-aramid, modacrylic and E-glass (as the core material), the protective textile achieved better performance than 100% para-aramid gloves. Moreover, the cost-effectiveness of this innovation is notable, as modacrylic and E-glass fibres are more affordable than para-aramid fibres, resulting in a product with comparable or lower costs with better performance.