GRUBS® Boots are made with four Brand attributes, they are WATERPROOF™, WARM™, COMFORT™ and GRIP™.
Most GRUBS® footwear use 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™.
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 which as suggested can expand not only in width but also height.
This super stretch means the bootie can stretch up to 150% as a laminate with our SUPER-DRI™, moisture wicking terry knit lining.
INSU-FOAM ULTRA™ has a fine micro cellular structure, which stops heat transfer through its structure.
The microscopic bubbles of air are so small that it is waterproof even in 3.5mm thickness.
Bootie technologies:
INSU-FOAM ULTRA™ is super soft and super bouncy, it has a compression set of less than 7% verses 20-25% for other neoprene boots, they remain soft and comfortable for much longer than our competitors.
Other manufacturers use Styrene Butadiene Rubber, SBR, foams that are stiffer and harden over time, SBR also has a larger and more irregular bubble structure, boots made of this material are harder making them uncomfortable and prone to leak through the bootie.
SUPER-DRI™ Moisture wicking linings use thousands of fibre loops which cosset the foot and wick away moisture keeping the wearer dry and comfortable.
Combined with 5.0 INSU-FOAM ULTRA™ to provide an unequalled comfort range without sweat and heat build up.
PROTECTING YOUR FEET:
GRUB’S® is the only brand that uses self hardening layers of epoxy impregnated material to stiffen the toe and underfoot chassis of our boots to give a sure footed platform and a protective toe that can take the same sort of knocks as high end mountaineering footwear.
NITROCELL™ A removable 6mm footbed adds further insulation and cushioning due to its microscopic closed cell nitrogen bubble structure, giving the wearer superior thermal protection from cold surfaces.
3.5 TECHNOLOGY™ boots feature a tough texturised nylon face and a moisture wicking SUPER-DRI™ Terry knit lining.
INSU-FOAM ULTRA™ is a temperature Neutral material it will keep the wearers foot comfortable in a range of 85ºF to 20ºF for a prolonged period (-5ºC to 30ºC).
5.0 TECHNOLOGY™ boots the Bootie is lined with moisture wicking SUPER-DRI™ terry knit, which keeps the wearer dry and has a super 100% stretch to fit most calves. As INSU-FOAM ULTRA™ is a temperature Neutral material it will keep the wearers foot comfortable in a range of 85ºF to sub zero for a prolonged period (-10ºC to 30ºC).
8.5 TECHNOLOGY™ 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 range of 60ºF to -40ºF (-40ºC to 15ºC).
10.5 TECHNOLOGY™ 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 of 60ºF to -40ºF (-40ºC to 15ºC).
12.0 TECHNOLOGY™ Our ultimate cold weather technology uses 8.5mm INSU-FOAM ULTRA™ to increase the barrier between the wearer and the environment unlike the Felt liner used in pack boots, it does not over heat the foot which can lead to skin irritation, instead it keeps the foot temperature in balance thanks to the air circulating properties of HIGHLOFT™. Temperature range 50ºF to -60ºF (10ºC to -50ºC)
Comparisons:
Brand Chloroprene Content Stretch Resilience (Bounce)
Grub’s 70-80% 300% 15-20º (7% loss)
MBC 30% 250% 5-7º (25% loss)
Bogs 10-15% 150% 10-13º (25% loss)
Grub’s has a very high Chloroprene content, which gives higher waterproof properties, more stretch, up to double that of BOGS. More cushioning and less loss of resilience than competition.
Ceramic™ Toe: Our safety toes are made from high-tech ceramic composite materials that meet ENISO: 20345 (EN345), ASTM F2413 (ANSI Z41) and CSA Z195 standards and are 50% lighter than the equivalent steel toe.
They are anti-corrosive, non-conductive; retain heat 50% longer than steel and three times less conductive to cold. HARD TOE™: self hardening layers of epoxy impregnated material to stiffen the toe of our boots to give a protective toe that can take the same sort of knocks as high end mountaineering footwear.
Outsoles:
TRAX™ Sole, TRAX™ (DURAPRENE™rubber) outsole, which give superior grip on a variety of surfaces, the tread is designed to work with the action of the foot into zones for Grip, Traction, Stability and breaking.
TREDZ™(DURAPRENE™rubber) outsole, which give superior grip on a variety of surfaces, the tread is designed to work with the action of the foot into zones: the centres of the fore-foot have our multi-directional TWIST-GRIP™ studs, which bite into soft surfaces, they are surrounded with large blocks which feature moulded SIPING just like the small grooves on a tire or the sole of a boat shoe they expel liquid to increase the surface area of the sole in contact with the ground and reduce aquaplaning incidents. Surrounding the forepart is our FOOT-FRAME™ providing stability around the forepart and increase torsional resistance in the arch.
OUTLINE™ equine sole provide safety and grip in the riding environment.
Incorporating HEXZORB™ technology, where a hexagonal shock absorbing component is directly moulded into the heel of the outsole, to dissipate shockwaves traveling up through the wearers leg when dismounting and walking.
WORX™ SOLE(Leather Boots): Our WORX sole has a 5mm chunky tread with a horse shoe ring of upright bars around the perimeter and bi-direction studs in the centre for grip on soft ground, moulded in our own branded rubber compound ‘DURAPRENE™’ glued and stitched direct to the midsole runner at the toe (DURALITE™ EVA midsole).
TRAXION™ SOLE: has a 5mm chunky tread with a horse shoe ring of upright bars around the perimeter and direction blocks in the centre for grip on soft ground, moulded in our own branded rubber compound ‘DURAPRENE™’ (DURALITE™EVA midsole).
DURALITE™ outsole (Hunt and WORKLITE models), gives superior grip on a variety of surfaces; the Classic tread is exceptionally light due to its blown construction.
YARD™ (Cityline and Fenceline models): Classic heeled sole with light tread for riding(DURAPRENE™ rubber).
TWIST GRIP™ ( POWDER model): the tread is designed to work with the action of the foot into zones: the centres of the fore-foot have our multi-directional TWIST-GRIP™ studs, which bite into soft surfaces.
HERRING BONE™ (Field and Woodline models) (DURAPRENE™ rubber) outsole.
GRID™ (PUDDLE, ABI, BETH and RACH models) (DURAPRENE™rubber) outsole.
Outsole technologies:
HEXZORB™ Technology, The TRAX™, OUTLINE™ and TREDZ™ soles feature our new HEXZORB™technology, where an Hexagonal shock absorbing component is directly moulded into the heel of the outsole, to dissipate shockwave traveling up through the wearers leg.
TWIST-GRIP™ studs, Twisted three pointed star designed studs, which bite into soft surfaces.
UNDERFOOT CHASSIS™ self hardening layers of epoxy impregnated material to stiffen of our boots and give a sure footed platform
FOOT-FRAME™ an additional stiffened rubber layer around the ball of the foot, providing stability around the forepart and increase torsional resistance in the arch.
DURALITE™ EVA midsoles and Outsoles: Lightweight super cushioning midsoles, between the stitched welt and the DURAPRENE™ outsole or Full outsole on some models, reduces weight under foot, provides shock absorption and comfort over a prolonged period.
DURAPRENE™ Nitrile Rubber compound: Our own branded rubber compound made to European standard with high durability and high frictional resistance and high grip characeristics.
Nail-protective insole: Nail-proof textile insole made from Heat treated ceramic and ballistic fibres is light and flexible whilst providing thermal insulation underfoot as it is four times less conductive to cold than traditional steel insoles.