eVac™ Dry Sack

eVac™ Dry Sack

We use waterproof, air permeable eVent® fabric on the base for valve-free air expulsion, allowing compact packing. Instead of straps for compression, just roll the sack down and air is pushed out of the base. Then close the buckle and you’ve just saved space. These sacks are oval-shaped, rather than round so they better fit the internal contours of a backpack.


    evac dry sac compressible waterproof

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    SKU: AEDS Categories: ,
      • Air permeable, waterproof eVent® fabric base
      • Valve-free air expelling design for compact packing
      • 70D fabric for strength
      • Oval base resists rolling, packs more efficiently
      • Waterproof non-wicking Hypalon roll top closure
      • 10,000mm waterhead, lightweight durable Nylon
      • All seams are double stitched and tape sealed
      • White interior for better visibility of contents
      • Use: storage of compressible contents, such as clothes and sleeping bags
    Size variation
    3 Litre
    11 CM
    17 CM
    28 CM
    3 L
    42 G
    5 Litre
    11 CM
    17 CM
    39 CM
    5 L
    48 G
    8 Litre
    13 CM
    21 CM
    44 CM
    8 L
    58 G
    13 Litre
    15 CM
    23 CM
    51 CM
    13 L
    69 G
    20 Litre
    17 CM
    27 CM
    60 CM
    20 L
    86 G
    35 Litre
    21 CM
    33 CM
    70 CM
    35 L
    112 G
    65 Litre
    25 CM
    38 CM
    85 CM
    65 L
    148 G

    Sea to Summit Evac Dry Sacks

    Sea to Summit Evac Dry Sacks


    70D Lightweight Fabric

    70D Lightweight Fabric

    This is our standard high density weave waterproof fabric. It is a 70 denier 210T Nylon with a white interior polyurethane (PU) coating. The High density 210T weave gives the fabric a stronger tear strength and greater durability. The white PU coating increases brightness when looking into dry sacks made with this fabric. We vary the PU coating to make two different versions of this fabric: 2,000mm water head rated, and 10,000mm rated. The 2,000mm fabric is used in our nylon stuff sacks, pack covers & compression sacks. The 10,000mm fabric is used in our lightweight dry sacks, eVac dry sacks, dry compression sacks.
    420D Big River Fabric

    420D Big River Fabric

    Otherwise known as our Big River Fabric, this is a super durable ripstop Nylon fabric with a white waterproof TPU (Thermo-Plastic Urethane) laminated to the inside. It is a 420 denier fabric with a water resistance in excess of 10,000mm (we exceeded the limits of our test rig).This fabric has a high density weave and is extremely abrasion resistant . We use this fabric in our range of Big River Dry Bags, Drypacks, and a selection of Solution Gear products where a tough, durable and waterproof fabric is required.
    210D Stopper Fabric

    210D Stopper Fabric

    Our Stopper fabric is made from 210 denier Nylon that is TPU laminated on the outside. The hydrostatic water head test went off the scale on our machine when we tried to find a limit. A departure from our usual internal TPU lamination, Stopper fabric has a stiffer feel than our Big River 420D fabric and a smooth water-shedding finish. The substantial TPU lamination allows us to construct dry bags with permanent welded seams that don’t require any sewing or taping. Stopper fabric is ideal where there is a lot of abrasion coming from the inside (contents) of a bag.
    600D Hydraulic Fabric

    600D Hydraulic Fabric

    The fabric our Hydraulic dry bags are made from, it is stiffer and tougher than our Stopper fabric. It is constructed from a 300D x 600D Nylon with a heavy TPU laminate exterior. The 600D X 300D is the best strength to weight fabric in this category, and the heavy TPU laminate gives a tough, smooth, water-shedding exterior and allows us to weld Hydraulic Dry Bags, meaning no sewing or taping is required. This is our guide/expedition grade dry bag fabric. Our Hydrostatic test machine couldn’t find the water-proof limits of this fabric, and we got bored with trying to abrasion test the fabric to destruction.
    eVent® Fabric

    eVent® Fabric

    eVent is a proprietary waterproof/breathable membrane fabric. Like all waterproof/breathable membranes, its micro-fine pores allow the passage of water vapour, but not liquid. There are numerous waterproof, breathable fabrics available, all with different characteristics. Traditionally, waterproof/breathable PTFE (polytetrafluoroethylene) membranes got clogged easily by body oils, which rendered them useless after a little use. The solution was to add a PU backing to protect the PTFE membrane. When thin enough, PU still allows vapour transmission, but at a much lower rate. Some manufacturers avoided the membrane and just used a PU coating. The PU has to be relatively thick to ensure sufficient waterproofing, resulting in even lower breathability. The genius of eVent was to make the membrane oleophobic (oil repellent), meaning it wouldn’t clog with oils, therefore didn’t need the inhibiting PU layer. At this juncture, eVent is the most breathable waterproof (20,000mm) fabric we know of. It is sufficiently breathable that a pressure gradient can force air through it. We use eVent in this way as a purge valve in the bottom of our eVac Dry Sacks and eVent Compression Sack range.


    The hypalon fabric is a synthetic rubber fabric which is reiforced by a woven nylon mesh . The fabric is completely waterproof, does not wick moisture and is highly abrasion resistant. It is soft enough to be sewn through and can be manufacuted in different thicknesses and strengths for differernt applications . Hypalon is used in our dry bag, dry pack, and pack liners to help seal off the roll top closure and prevent water from wicking in through the roll top . Hypalon is used as a trim material in our travelling light range as grab tabs for our zippers. They provide a good level of stiffness without the weight or bulk of webbing while also being impervious to water . We also use hypalon to protect high wear areas and fashion structural anchor points where webbing anchors maybe too bulky or limiting.



    Silicone rubbers or more accurately polysiloxanes are inorganic elastomers with unique properties. The molecular structure is contains Silicone atoms in the backbones as opposed to carbon atoms in most organic polymers and plastics. This makes silicones highly elastic and chemically inert. Silicone rubbers are best at retaining and regaining the original shape after deformation and thus are an ideal choice for resilient components. Silicones are also much more chemically inert and heat resistant as compared to organic polymers. This makes silicones safe for food contact applications and therefore we chose these to invent our X Series range of collapsible kitchenware for outdoor use. Silicones retain their elasticity and food safe properties even after being subject to temperatures in excess of 200 degrees C. The silicones used in our X series range of products are compliant to the food safety standards across the world and being chemically passive do not retain food odours.
    Lightweight Aircraft Alloy

    Lightweight Aircraft Alloy

    Lightweight Aluminium alloys are known for their excellent strength to weight ratios and versatility for different applications.