The Midline 5.0 Ankle
combines Grub’s unique Insu-Foam Ultra technology with advanced 5.0 thermal engineering. Featuring the Trax sole with Hexzorb Duraprene technology. An ideal boot for most work or leisure activities.
- Super-Dri lining
- Under Foot Chassis
- Nitrocell insulating and cushioning foot-bed.
All Grub’s footwear use our self-insulating INSU-FOAM ULTRA bootie construction which is super soft and super bouncy, with a compression set of less than 7% verses 20-25% for other neoprene boots, so they remain soft and comfortable for much longer. INSU-FOAM ULTRA has a fine micro cellular structure, which stops heat transfer through its structure. The bootie exceeds the long-term effectiveness of waterproof membranes and lofted insulations, such as GORE-TEX and 3M Thinsulate.
We use a super stretch Chloroprene material, commonly used in deep-sea dry suits, this material has a 300% stretch and is covered with a 4-way stretch knitted nylon jersey. This means the bootie can stretch up to 150% as a laminate with our super dry, moisture wicking terry knit lining.