FROSTLINE 5.0™ CLASSIC
FROSTLINE 5.0™ CLASSIC is insulated and waterproof, with excellent grip, made for all day comfort.
Main Features
- 5MM INSU-FOAM ULTRA™ – Provides all-round foot comfort and insulation.
- 6mm NITROCELL™ footbed – Soft cushioning and insulation from cold surfaces via nitrogen bubbles.
- UNDERFOOT CHASSIS™ – Ensures a sure-footed platform.
- HEXZORB™ technology – Absorbs heel strike shock for day-long comfort.
- SUPERDRI™ lining – Durable, moisture-wicking, fungus and rot proof, odour-free.
- TRAX™ outsole – Excellent grip on varied surfaces, adapts with foot motion.
- COMFORT RATING – -20°C to +20°C.
INSU-FOAM ULTRA™
GRUBS® footwear features self-insulating INSU-FOAM ULTRA™ bootie construction, both waterproof and insulating, surpassing traditional membranes. Waterproof to EN ISO 20344: 2004 5.7 standard.
Utilizes super stretch Chloroprene with 300% stretch, covered by 4-way stretch nylon jersey, forming a flexible and waterproof structure. Compression set is under 7% (vs. 20-25% in other neoprene boots), offering unmatched softness and comfort.
Competing materials like SBR (Styrene Butadiene Rubber) are harder, stiffer, and prone to leaking. INSU-FOAM ULTRA™ is superior in comfort and longevity.
5.0 TECHNOLOGY™
The bootie features moisture-wicking SUPER-DRI™ terry knit lining. INSU-FOAM ULTRA™ is temperature neutral, providing comfort from sub-zero to 85°F for extended wear.
TRAX™ Sole
DURAPRENE™ rubber outsole with HEXZORB™ offers grip, traction, stability, and braking by adapting to foot zones.
Sizing: Boot Height & Calve Widths
| UK Size | Boot Height (mm on leg) | Calve Width (circumference in mm) |
|---|---|---|
| UK3 | 370mm | 400mm |
| UK4 | 370mm | 400mm |
| UK5 | 375mm | 410mm |
| UK6 | 380mm | 410mm |
| UK7 | 385mm | 420mm |
| UK8 | 390mm | 420mm |
Note: Our Wellington Boots have a 15mm allowance for wool blend/combination socks. We recommend ordering your usual size. For half-sizing, we recommend sizing down.
Care Instructions
BRUSH ME, WASH ME: Hose down after each use. Monthly, wash with water or mild soap. Scrub gently with a soft brush and air dry naturally (avoid direct heat).
OIL ME: Once dry, use a rubber conditioner or natural oil, especially on flex points. Recommended: Revivex rubber care spray available at grubswarehouse.com.