Non Breathable Waterproof Fabrics
Breathable Water Resistant Fabrics
Breathable Waterproof Fabrics
Guy Line
Mesh Fill
MLD specializes in designing the lightest possible solution to a particular super ultra light backpacking goal. Our fabric choices range from .6oz/sq/yd to 10oz/sq/yd and are targeted to the performance goal of each product. We choose our fabrics based on performance alone, never price points.
NOTE: Fabric industry standards usually list fabric weights of the uncoated or untreated raw fabric. Ex: Pertex Quantum is listed as .9oz/sq/yd but it's final after DWR treatment 1.0+oz/sq/yd. Fabrics listed as .85 or .9 are really 1.0 -1.1oz/sq/yd weights. Spinnaker fabrics are often listed in sail makers yards(28.5"X36") which is much smaller than a square yard. MLD uses the actual finished weight of fabrics in names and definitions.
Non Breathable Waterproof Fabrics
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Spectralite.60
An MLD .6oz/sq/yd weight of Cuben Fiber. Cuben Fiber laminates use unidirectional prepreg tapes of in-line plasma treated Dyneema/Spectra fibers spread to mono-filament level mylar films with titanium UV protection. After extensive testing of various weights and weaves of CF, this was the very lightest CF that retained enough strength and abrasion resistance for SUL gear. We use a special permanent adhesive tape and reinforcement patches to limit sewing that weakens the mylar substrate. Our Cuben tarp ridgelines are sewn and glued for max strength and do not require the additional weight of seam sealing. Fully waterproof in the hardest rain and can be field patched with duct tape. It's been used successfully on multiple CDT thru-hikes. Less than half the weight of Silnylon, but four times the cost. It's the cutting edge of Solo Super Ultra Light in low weight, but unfortunately, it is very pricey.
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Spinntex .97
.97 oz/sq/yd silicone impregnated ripstop polyester spinnaker fabric. The silicone coating is a harder version than in the more common 1.35 Silnylon. This is the lightest and strongest fully waterproof conventional spinnaker fabric available and can withstand than the hardest rain. High tenacity nylon fibers are woven on special looms to create ripstop weave of 20d X 25d that is light and durable. It has a very low stretch and requires less curves be used in a tarp design.
From 2002 to 2007 we tested over 75 lightweight spinnaker fabric and this one was IT.
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Spinntex 1.17
1.17 oz/sq/yd silicone impregnated ripstop nylon spinnaker fabric. The silicone coating is a harder version found in the more common 1.35 Silnylon. This is a 25d X 30d weave with a tighter ripstop pattern that the Spinntex .97. Mainly used for some reinforcements.
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Silnylon 1.35
This 1.35 oz /sq/yd fabric is what is generally thought of as Silnylon, 1.4 silnylon, 1.1 Sil-Nylon or Silicone Impregnated Nylon and is the most common Silnylon used. A 1.1 oz /sq/yd nylon 30d X 30d ripstop weave is impregnated with a silicon polymer that cures to a soft feel and allows some stretch. Small punctures self heal to a small extent. Like the Spinntex silicone impregnated fabrics, cougar bites can be repaired easily with Silnet adhesive and a supplied matching fabric patch for a long product service life. NOTE: Complete head enclosure in any bivy sack is not recommended. Proper instruction is required and is not provided by MLD.
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Silnylon 2.0
A super tough 2 oz /sq/yd 40d X 40d ripstop nylon with more silicone impregnation and twice the strength of 1.35 Silnylon. Far tougher than 1.9 PU Coated or 70d PU coated ripstop nylon and it weighs a lot less.
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SuperGrid 2.0
A 2oz/sq/yd super tough spinnaker laminate with a diagonal reinforcement grid bonded to the base fabric. Its firm feel helps it hold shape in various applications while remaining light and durable. The laminate is translucent allowing positive ID of contents inside a Prophet Pocket.
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70d Silicone Coated Ripstop Nylon
2.2oz/sq/yd . A 70d ripstop nylon is coated on one side with silicone. We use this for the back panel on the Prophet Pack. The relatively heavy .4oz/sq/yd of silicone coating (more than double that in 1.35 Silnylon) makes it waterproof and way strong. The uncoated nylon side feels better against the back and its low slip is a plus in the ALpine Bivy or shelter floor. Stronger and lighter than comparable 1.9oz/70d PU coated ripstop nylon.
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140d Spectra Grid Stop
4oz/sq/yd A "heavy weight" ripstop nylon fabric (with the ripstop pattern woven from spectra strands) that is pretty close to bombproof. A tough PU coating keeps it waterproof. Used for the bottoms and back panels in the Zip packs. Yeah, we wish there was a 100d Spectra Gridstop with silicone coating too
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Breathable Water Resistant Fabrics
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Momentum
1.05oz /sq/yd A 20dx20d nylon taffetta with single side heat calendering and state of the art DWR treatment. The surface is a flat black for speed drying. Also, it's made in the US. Momentum's tight weave adds to the DWR ability by virtue of the tight weave Momentum on our quilts.
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Real Life Testing
#1: We continue to get frequent field reports that bivys with Momentum tops repelled all splashed and blown rain and snow under even the smallest tarps and that internal condensation was non-existent or at least far lower than any other bivy used before. Note: In particularly adverse humidity conditions, all bivys will experience some internal condensation. The amount varies with the bivy design, weather specifics, user's moisture output (sweat and exhalation) and bivy venting.
#2 We lined a bivy with tissue paper and then poured water on the top to form multiple shallow pools ( think: splashed or blown rain) of approx. .1 to .3 ozs and left it overnight undisturbed. The tissue stayed fairly dry and by moving the bivy all water ran off the top. (All tests with more generic 1.1 DWR's had some soak though, some really horrible!) if a lot water is soaking through, the wind is too and your losing heat.
Momentum Compared to 2006/7 Pertex Quantum
The closest lightweight dwr fabric to Momentum's performance found in our testing was Pertex Quantum. Momentum has the same 20d X 20d weave and the same final weight of 1.05oz/sq/yd. We do not know of anyone else that has directly tested Momentum against various other SUL breathable DWR fabrics (over a dozen) including 2006/7 Pertex Quantum in bivy tops and SUL bag/quilt shells like we have. In bivy and sleeping bag applications, we found them equally breathable but the Momentum had better water resistance and snag resistance. We suspect that this is due to Momentum's highly symmetrical weave that creates more uniform moisture venting intricacies in the weave that are of a smaller size but more numerous than Quantum's.
We feel that Momentum is the Best of the Best for our applications. You get what you pay for, and with Momentum that's true too. It was the most expensive raw fabric of all the light DWR fabrics we tested. NOTE: Complete head enclosure in any bivy sack is not recommended. Proper instruction is required and is not provided by MLD.
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Epic
1.7 oz/sq/yd ripstop nylon. 30d X 50d weave with the individual fibers silicone encapsulated for water resistance and strength. www.nextec.com/thetech/ We no longer offer it as a standard option for bivy or bag tops due to recent reports that in near freezing temps, internal moisture vapor moving through the fabric to the outside can freeze in the fabric matrix and prevent all breathability. (Tents w/ Epic have a much greater surface area vs. a bag or bivy and the effect is less pronounced) Epic is a great hammock material due to it's high strength to weight ratio, greater stretch in the width (shoulders/hips) and lower stretch in the length (flat sleep position) and it is totally impervious to blown or splashed rain/snow underneath and won't wet out and add carry weight or require long drying times. NOTE: For some select uses, Epic may still be a good choice for a bivy or bag and we can custom build that for you. NOTE: Complete head enclosure in any bivy sack is not recommended. Proper instruction is required and is not provided by MLD.
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Breathable Waterproof Fabrics
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eVENT
We use the lightest eVENT made, 2oz/sq/yd . A two ply 25dX25d ripstop nylon base fabric with the PTFE eVENT membrane applied. It is totally waterproof and highly breathable. It's not quite as breathable as Momentum but eVENT will withstand direct rain. We now use this in our bags and bivys instead of Epic. www.eventfabrics.com/index.php The two ply is a lot lighter than a three ply and does require user care. The membrane is exposed in a bivy and can be scratched if not carefull. eVENT is the current totally waterproof and highly breathable top dog. NOTE: Complete head enclosure in any bivy sack is not recommended. Proper instruction is required and is not provided by MLD.
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Guy Line
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Solid Core Braded Dacron
NOTE COLOR CHANGE: We no longer have the bright yellow. It's now a muted orange.
1.8mm, .8oz per/ 50ft, 200+lb breaking strength. Solid Dacron core, ultra tight triple braid Dacron sheath. We tried all manor of other lines. We even had Spectra/Dyneema manufacturers build polypropylene and polyester wrapped Spectra/Dyneema cores to our specs. We tried the uncoated mini braid spectras and about 20 other types of coated and lines from various manufacturers. We tried them with and with out woven and /or coated sheaths. We tested various mini tensioners and line lock devices and discarded them too. Our hunt was for the perfect SUL cord that
1: Was light
2: 200lbs or stronger (wet, knotted, older, weaker lines can break in monster winds or after tripping over them)
3: Sheath characteristics with a diameter large enough to prevent psychosis inducing tangle fests (a lot of the spectra waterproof surface treatments were too rough and the tangle fests made us insane)
4: Sheath with enough friction (knot holding power) for a simple and secure girth hitch on a 1/8" Ti needle stake (common uncoated white Spectra is too slick)
5: Very Low Stretch
6: Lowest cost that also met all above criteria.
We ended up with the unassuming Solid Core Braided Dacron Line at half the cost of the spectra/dyneemas. We include it FREE with every tarp and shelter and if you mess up cutting your tarp lines to workable lengths, we'll send you more line free. (pictured is 50 feet)
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Mesh
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3D Spacer Mesh
8oz/sq/yd soft polyester wicking mesh used on the business side of backsack straps. About 1/8" thick, soft and non abrasive. One of the most common used by all backpack manufacturers.
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4.0 Open Mesh
Used on the rear pockets of packs. Super tough with a multi weave pattern. Largest hole is 1/8". Twice the abrasion and tear strength of what we used before 2007.
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Fill
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900 fp Down
We sourced the very best down from Canadian Prime
White Goose Down to match our Light Weight and Max
Performance goals. No feathers or shafts, just pure
white full down clusters harvested from mature geese
that listen only to classical music.
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