HDry | Footwear NO WATER INGRESS IN THE SHOE:<br>THAT’S HDRY <b>TRUE WATERPROOFNESS</b>

NO WATER INGRESS IN THE SHOE:
THAT’S HDRY TRUE WATERPROOFNESS

HDRY PATENTED ‘3D DIRECT LAMINATION’ TECHNOLOGY MAKES FOOTWEAR WATERPROOF BY SEALING THE UPPER SO NO WATER GETS IN

The HDry waterproof breathable membrane is directly laminated to the inner side of the upper sealing the material and all seams. Shoe lasting and outsole application completes shoe waterproofing.

Thanks to these unique features, HDry enhances footwear comfort and performance. Particularly when compared with the standard waterproof 'bootie' system where the membrane is combined with the lining and separated from the upper layer, leaving a cavity for water to penetrate and stagnate: shoes get soaked and breathability is reduced by the water layer.

With HDry ‘direct lamination’ technology, there is no space in between and water remains out of the shoe with three clear advantages:

The weight of a wet shoe is significantly reduced because it does not become saturated and filled with water.

As a result of less saturation, breathability is improved – again helping with keeping your feet dry.

Boots take much less time to dry.

Alpine environment

Membrane laminated upper

HDRY BENEFITS

TRUE WATERPROOFNESS

HDry eliminates gaps, typical of footwear with waterproof lining, between upper and membrane where water can stagnate. You will no longer need to carry this excess weight: exertion is reduced, and performance increased. Shoes keep light and dries much faster.

BREATHABILITY

The HDry membrane has very high and certified water vapor permeability rate. The absence of seam-sealing tape enables to exploit 100% membrane surface maximizing breathability.

COMFORT AND THERMICITY

HDry technology shift away the membrane from the foot leaving a large volume of dry air surrounding it. This dramatically reduces condensation from perspiration and keep stable the foot temperature (by eliminating the loss of heat caused by the water layer typical of ‘bootie’ construction).

PERFECT FIT

HDry seals the upper's inner surface with an ultra-thin membrane with no folds, no seams, and no seam-sealing tape. This eliminates any potential points of friction with the foot, decreasing the risk of blisters in hiking.

«The direct lamination of the membrane to the upper eliminates drawbacks associated with traditional waterproof ‘bootie-type’ system»

SATRA’s advice on ‘bootie-type’ membrane

FOOTWEAR EMPLOYING A BOOTIE-TYPE MEMBRANE CONSTRUCTION CAN RESULT IN WATER BECOMING TRAPPED BETWEEN THE UPPER AND THE MEMBRANE.

Courtesy of SATRA – page 40 of the February 2013
issue of SATRA Bulletin. (emph. added)

Water ingress into footwear can result in a number of performance failures. The most obvious of these is water penetrating to the wearer’s foot, although other effects can also be encountered. Water penetrating into insulation layers can lead to a significant reduction in thermal efficiency as water, which is highly conductive of heat, replaces the eicient insulation previously provided by trapped air in the dry footwear. Water ingress can lead to rotting of internal components, a reduction in material strength (for example, contributing to sole bond failures), bacterial growth and associated bad odours, and significant weight increase due to retained water.

The inclusion of water-resistant membranes, which is one technique used to provide water resistance, does not, in itself, remove the requirement for care in the selection of materials, detail design or manufacturing controls. For instance, poorly designed or poorly manufactured footwear employing a bootie-type membrane construction can result in water becoming trapped between the upper and the membrane. While this does not result in water penetrating to the wearer’s foot, it can still lead to the performance failures listed at the start of this article.

NO WATER INGRESS IN THE SHOE:THAT’S HDRY TRUE WATERPROOFNESS