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There are numerous types of Helly Tech® Fabrics. The main differentiator is the number of plies (or layers)
the fabric is built from.

Extremely waterproof and breathable designs and constructions. For highly aerobic, extremely wet
or unusually long-lasting activities in extremely harsh conditions.

Highly waterproof and extra breathable sport specific designs and constructions.
For a wide range of high performance outdoor activities during highly challenging, changing and
unpredictable weather conditions.

Fully waterproof, windproof and breathable fabrics and constructions.
For all situations and weather conditions where protection from the elements is needed.

3 PLY CONSTRUCTION
Outer fabric + membrane and inner fabric bonded together for lightweight, quick drying and
durability.

2,5 PLY CONSTRUCTION
Outer fabric + membrane or coating bonded together with protective print on the inside for extreme
lightweight and packability.

2 PLY CONSTRUCTION
Outer fabric + membrane or coating bonded together for breathable waterproofness, protected by
inside lining or mesh adding warmth and comfort.

LAB TESTS

WATER COLUMN, ISO 811 and JIS LIS L 1092-B1
Gives the value pressure mm of water held back by fabric. 10.000mm is the same pressure you would experience diving to 10m or equal to the pressure
from a fire hose.
BREATHABILITY, JIS L 1099-1985-B1
Gives the value of g/m /24h - the amount of water molecules that can pass through 1 square meter of fabric within 24 hours.
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15.000 grams breathability equals that a jacket is able to pass 30 lites of water in 24 hours.
In comparison, our human body perspirates 1 liter per 24 hours.
water repellence, ISO 4920: 1981 and AATCC 35-2006
Spray test: testing of the durable water repellence before and after washing, by drizzling the fabric and measure how many drops that bounce up and
if any attaches or wets out the fabric surface.

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