Grubs CERAMIC 5.0 S5™ Safety Boot
Grubs CERAMIC 5.0 S5™ is the world's first rubber safety boot that uses non-metallic materials. This means it conducts neither cold nor electricity, making them popular in a wider field of safety footwear.
Key Features
- CERAMIC SAFETY TOE – Complies with BS EN ISO 203450 S5 without cold absorbing/emitting metal materials.
- DEFENDER™ – 5mm Ballistic insole that is lightweight and flexible, passing both BS EN ISO 20344:2004 5.8.2 penetration and 5.9 flex resistance standards, without the cold of steel.
- 5MM INSUFOAM-ULTRA™ NEOPRENE – Provides all-round foot comfort and warmth with calf-height rubber.
- 4mm Rubber Coverage – Offers high resistance to puncture and flex cracking over the whole foot area.
- 6mm NITROCELL™ Footbed – Delivers soft cushioning and an athletic shoe feel, with microscopic nitrogen bubbles that insulate from cold surfaces.
- TREDZ™ (DURAPRENE™ rubber) Outsole – Ensures superior grip, oil resistance, and passes TM144:1999 slip resistance test.
- COMFORT RATING – Effective from -20°C to +20°C.
Additional Technologies
- HEXZORB™ – Hexagonal shock-absorbing component molded into the heel to reduce shockwaves through the leg.
- SUPER-DRI™ – Wicking lining that keeps the foot dry and comfortable, paired with 5.0 INSU-FOAM ULTRA™ for unmatched comfort and reduced sweat/heat build-up.
Sizing: Boot Height and Calf Width
| UK SIZE | BOOT HEIGHT (mm) | CALF WIDTH (mm) |
|---|---|---|
| UK6 | 380mm | 410mm |
| UK7 | 385mm | 420mm |
| UK8 | 390mm | 420mm |
| UK9 | 395mm | 430mm |
| UK10 | 400mm | 430mm |
| UK11 | 405mm | 440mm |
| UK12 | 410mm | 440mm |
Please note: Our Wellington Boots have a 15mm allowance for wool blend/combination socks. We recommend purchasing the same size as your everyday comfortable footwear. For half-sizes, due to the allowance, we suggest sizing down.
Care Instructions
- BRUSH ME, WASH ME: Hose down after each use. For monthly deep cleaning, use water with mild soap and a soft brush. Let boots air dry naturally.
- OIL ME: After drying, apply rubber conditioner or natural oil to maintain flexibility—especially on toe and ankle areas. We recommend Revivex Rubber Care Spray, available on grubswarehouse.com.