Each safety style states its EN ISO rating
The Titan Storm is built for the days the forecast gives up on. It is a fully waterproof S7S safety boot, 100% metal-free, with a quick-release side zip, a waterproof smooth leather upper and a 300 degree heat-resistant outsole. Certified to EN ISO 20345:2022 S7S SR FO WR HRO, it is the Titan boot for outdoor trades on exposed sites, in black, UK sizes 3 to 13.
WR means the whole boot is tested for water resistance, not only the leather. Waterproof smooth leather upper, rated S7S under EN ISO 20345:2022.
Non-metallic toe cap and a non-metallic penetration-resistant midsole tested against the fine 3 mm nail. Lighter underfoot and scanner safe.
The quick-release side zip gets you in and out in seconds at the start and end of a shift, without unlacing a wet boot.
Heat-resistant outsole rated for 300 degree contact, SR slip resistance and fuel oil resistance, so it copes with hot surfaces, wet floors and diesel.
S7 is the top waterproof rating for leather safety boots under EN ISO 20345:2022. It takes everything in S3, a toe cap, closed heel, antistatic, energy-absorbing heel, water-resistant upper, cleated outsole and penetration resistance, then adds WR: the finished boot is flexed in water and has to stay dry inside. That is a harder test than an S3 upper on its own, and it is why the Storm is the Titan boot to wear on groundwork, landscaping, utilities, rail and any site where you stand in wet ground for hours. The S suffix tells you the penetration-resistant insert is non-metallic and tested with the finer 3 mm nail, and together with the non-metallic toe cap it makes the Storm fully metal-free.
The Storm sits between its two waterproof S7S siblings. The Titan Cyclone is the side-zip boot one step below it, built around drivers and multi-drop work. The Titan Striker replaces laces with a FITGO dial for an even, micro-adjustable fit and sits at the top of the range. All three share the same S7S SR FO WR HRO certification, so the choice is about closure and fit rather than protection. For the rest of the range see the Titan range; for waterproof boots from every brand we carry see our waterproof safety boots collection; for other zip-up styles see side zip safety boots; and our size and fit guide covers how Titan fits.