Description Unbreakable Composite Black Trainers Unbreakable U130 Blaze S1 PL FO HRO SR Composite Black Flyknit Trainers.  Lightweight and strong thanks to the composite toe-cap and composite anti-penetration midsole. The new moulded and contoured insole make for high comfort all day wear. Lightweight, durable, and built for performance, the Unbreakable S1 Composite Safety Trainer offers reliable protection with all-day comfort. Designed to meet demanding workplace requirements, this safety boot combines advanced materials with a sleek, athletic profile — ideal for fast-paced environments. UNBREAKABLE Professional Workwear enters the market ensuring quality and reliability, with products made to withstand the toughest environments. Over 75 years of experience in PPE. Unsure what safety footwear you need for your work or industry. We can help, click here… Unsure what the Safety and Slip Rating Codes (SB, S1P, SRC etc.) We can help, click here… Features S1 PL FO HRO SR Protective toe cap composite trainers(200 joules impact protection) Energy absorbing heel Fuel oil-resistant outsole (FO) Penetration resistance with a non-metallic (composite) midsole Heat Resistant Outsole: Can withstand contact heat up to 300°C for 60 seconds. Slip Resistance (tested on ceramic tile with detergent and steel floor with glycerol) Thick padded collar and tongue 5-tie lace up enclosure Flexible composite, anti-penetration midsole for underfoot protection Protective scuff cap Lightweight 499g/trainer size 8 Flexible, high comfort all day wear. Composite Black Trainer 3-13 Materials Flyknit upper