NORTH FACE Mens Four Shadows GTX Winter Boot
A tough and durable boot for technical backcountry adventures: the Four Shadows GTX chomps into ice and snow with each step thanks to TNF Winter Grip and Ice Pick technology. Designed with a waterproof, breathable GORE-TEX membrane, these resilient boots offer superior protection for cold weather activities, keeping your feet warm down to -40° F / -40° C.
FEATURES:
- Synthetic Nubuck and Bomber Abrasion Resistant Synthetic Mesh Upper
- Gore-Tex Waterproof Breathable Membrane
- 400g PrimaLoft Eco Insulation
- -40° F / -40° C Rated
- AgION Antimicrobial
- Dri-Lex Fleece Lining In Collar and Tongue
- Gusseted Tongue
- Heal Cradle with Dual Density EVA Midsole
- EVA X2 Heel Insert
- Full Length Injection Molded TPU Shank
- TNF Winter Grip Outsole
- Ice Pick Temperature Sensitive Outsole Lugs
Gore-Tex for Footwear
Gore-Tex: Gore-Tex fabrics lead the industry in providing durable waterproof, breathable protection. The Gore-Tex membrane is completely impervious to rain, sleet, and snow, while allowing perspiration to pass through it. Tiny pores in the Gore-Tex membrane allow perspiration to escape while preventing water from entering. In order to meet the waterproof standards of Gore-Tex footwear, shoes must pass a rigorous waterproof flex test, whereby 75 percent of the shoe is submerged in a bath of water and repeatedly flexed. The test measures the number of flexes the shoe can withstand before leakage is detected. A minimum of 300,000 flexes (equivalent to five days of constant flexing) must be attained before the shoe is granted the Gore-Tex waterproof rating.
Gore-Tex XCR: Like traditional Gore-Tex, Gore-Tex XCR fabric is durable, waterproof, and windproof, but is even more breathable than ever before.
PrimaLoft Eco
PrimaLoft Eco is a patented ultrafine microfiber blend that is incredibly soft, lightweight and water repellent, spun from partially recycled materials. PrimaLoft synthetic insulation absorbs three times less water, is 15% warmer when dry and is 24% warmer when wet that the closest competitive insulation. In addition to these impressive thermal properties, PrimaLoft is lightweight with a down-like softness that adds comfort and appeal.
Heal Cradle Technology
As the beginning of every stride cycle, the heel plant is critical. It must help to absorb the forces of body mass, momentum, and torque. Also, it is the first stage in stabilizing the foot plant, setting the tone for the remainder of the stride.
The North Face Heal Cradle utilizes two constructions in providing the precisely correct performance to the outdoor athlete: - In rugged terrain or when the athlete is bearing a moderate to heavy load, Heal Cradle Technology utilizes a polyurethane (PU) foundation. This composition maximizes shock absorption.
- In situations that call for a lighter weight construction and not as much shock absorption, a higher-density EVA replaces PU.
In both cases, the topmost Heal Cradle layer has a slightly cupped shape that literally cradles the heel, helping to stabilize it in the process. Ultimately, Heal Cradle seamlessly offers more lateral/medial stability to the foot, positioning it for a smooth transition into the next stage of the stride cycle.
EVA
The acronym for Ethylene-Vinyl Acetate. EVA is used in many footbeds, midsoles and outsoles. EVA provides lightweight, flexible cushioning that is highly impact resistant. EVA also acts as an insulation barrier in cold weather products.
X-2 Cushioning
Embedded in EVA midsoles and placed in high impact areas, X-2 Cushioning combines durability, lightness and a high ratio of energy return.
TNF Winter Grip
TNF Winter Grip is a softer, tackier rubber compound designed specifically to provide optimum protection in the wettest and slickest winter conditions. When used in conjunction with The North Face winter-specific outsole designs with multidirectional lugs and a substantial contact area, TNF Winter Grip is the ideal ingredient for winter`s snow and ice.
SPECIFICATIONS:
| Upper: | Synthetic Nubuck and Bomber Abrasion Resistant Synthetic Mesh, Gore-Tex Membrane |
| Footbed: | AgION Dual Density EVA |
| Insulation: | 400g Primaloft Eco |
| Midsole: | Heal Cradle, X-2 Heel Insert, Dual Density EVA |
| Outsole: | Full Length Injection Molded TPU with TNF Winter Grip and Ice Pick Temperature Sensitive Lugs |
| Weight: | 2 lb 14 oz / 1308 g per Pair, Mens 9 |
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