GRUB's Technologies
All Grub's® footwear uses our self-insulating INSU-FOAM ULTRA™ Bootie construction which acts as a neutral medium between the wearer and the outside.
The bootie is both waterproof and insulating and exceeds the long-term effectiveness of waterproof membranes and lofted insulations, such as GORE-TEX® and 3M Thinsulate™
In our 5.0 TECHNOLOGY™ boots the bootie is lined with moisture wicking terry knit, which keeps
the wearer dry and has a super stretch to fit most calves. As INSU-FOAM ULTRA™ is a temperature
neutral material it will keep the wearers foot comfortable in most conditions for a prolonged period.
TEMPERATURE RANGE 85 to -5 Fahrenheit (30 to -10 centigrade)
A moisture wicking polyester fleece lining combined with our HIGHLOFT™ liner is made from thousands
of tiny fibres that allow air to circulate and trap heat, like down feathers. The liner wicks away
excess perspiration and creates a comfortable temperature inside the boot in bitter winter weather.
TEMPERATURE RANGE 60 to -40 Fahrenheit (15 to -40 centigrade)
Adds a Further 2mm of tough yet flexible natural rubber to our already excellent 8.5 TECHNOLOGY™ to
make a super tough shell that can resist the most brutal forest conditions.
TEMPERATURE RANGE 60 to -40 Fahrenheit (15 to -40 centigrade)
