The Exline RB421 is an ultra-lightweight composite-toe athletic-style work shoe that features seamless uppers for a glove-like fit. A one-piece gel cushioning system with full-heel coverage offers full-foot comfort. Its lightweight and flexible injected-EVA ultimate insert provides superior shock absorption and full-foot comfort with cushioning and arch support. Dual-density EVA in the heel absorbs shock. Electrical hazard protection. Safety rated in accordance with ASTM F2413.