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Do moisture-wicking fabrics work?

Moisture-wicking fabrics (base layers and underwear) are designed to move sweat away from the skin. In this study, we test if Polartec and other base layer fabrics meet manufacturer claims.

Synthetic Insulation Degradation Part 2: Thermal Performance vs. Compression

How bad does high-loft synthetic insulation (Climashield Apex and Primaloft Gold) degrade when subjected to repeated compression cycles? What's the impact on backpacking gear and apparel?

By the Numbers: the Search for a High-MVTR Waterproof Breathable Shell Jacket

A high MVTR waterproof-breathable shell jacket may be the holy grail that can replace both a wind shirt and a rain jacket. Do they exist, and where do we find them?

By the Numbers: Crushing It – How Bad is Thermal Degradation in Synthetic Insulation?

In part two of this investigation, we see what happens when you crush insulation beneath a stack of concrete pavers - again and again.

The Search for a Fleece Replacement – A Close Look at Active Insulation and the role of MVTR

What is MVTR's role in active insulation garments?

Air permeability vs. moisture vapor transmission rate (MVTR): which one impacts moisture transport more in wind and rain jackets?

This study compares the performance of four jackets made with fabrics that span a wide range of air permeability rates and moisture vapor transmission rates (MVTR). The study shows that significantly greater moisture removal can be achieved as a function of jacket MVTR than jacket air permeability.

By The Numbers: How Bad is Thermal Degradation in Synthetic Insulation?

The latest findings on thermal degradation in synthetic insulation from Stephen Seeber may surprise you in this By The Numbers column.

By the Numbers: Is Synthetic Insulation Warm When Wet?

We throw some quantitative testing at an oft-repeated synthetic insulation claim to measure the thermal performance of wet insulation.

By the Numbers: Rethinking Fleece

Stephen Seeber subjects ten fleece samples to rigorous thermal testing.

By the Numbers: Thermal Performance Measurements of Synthetic Insulations

Stephen Seeber presents measurements of several market-leading insulations along with four performance metrics to help judge their performance.

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