Double needle flat felled seams (lockstitch). This is a very strong seam used to sew lightweight fabrics together. All our double needle lap felled seams are sewn with ¼” gauge double needle, needle feed sewing machines. Depending on the fabric either a mechanical puller is used or a second operator helps apply tension to the fabric as the fabric is being sewn. Ultralight fabrics and silicone coated fabrics, where both sides of the fabric have a silicone elastomer coating, are especially difficult to sew without puckering. That is why mechanical pullers or second operators are used.
Fabric Coatings. We use polyether, Titanium Dioxide or silicone elastomer coatings on our waterproof fabrics. We do not use PU (polyester urethane) coatings which are hydrophilic (absorb moisture) and start smelling like a locker room over time. PU is the appropriate acronym! PU coatings are not very durable and start deesterfying over time. It is rather unintuitive that (PU) waterproof coatings absorb moisture. That is why we use hydrophobic PE coatings instead of PU coatings. The story gets more complicated so rather than bore you to death we will add a link with more details as we build out the site.
Waterproof ratings. There are many tests to determine the waterproofness of fabrics. Mullen Burst tester, Suter tester and water column testing devices provide the most useful data that can use for comparative purposes. SlingFin provides waterproof data using the water column test method.
Titanium Dioxide bias binding. SlingFin is the first to use ET70 (titanium dioxide bias binding) on tent body and Web truss perimeters (BFD, LFD, High & Mighty and the Last Resort). This is an important detail since nylon and polyester bias bindings will degrade much sooner than the rest of the tent and Web Truss which is made of ET70.
Nylon bias binding sewing. All seams sewn with bias binding are sewn with a double needle, needle feed sewing machine with a 1/8” needle gauge.
Perimeter reinforcement. We use ½” to 3/4" nylon or polyester grosgrain to reinforce the perimeter of tarps (Under the Influence) and flysheets (One Up). This feature is applied to add strength and to reduce perimeter bias stretch. This is especially important on tarps which act as wings and often have tremendous forces applied to them in windy conditions.
Oversized YKK zippers. We use #10 YKK® zipper chain with double nickel coated zipper sliders on the doors of the BFD, LFD and Last Resort.
Reinforced doors. The BFD, LFD and Last Resort have two 900D reinforcements on the door frame and one large 900D reinforcement on the door itself.
Grosgrain reinforcements. All perimeter tie-outs and grommet tabs have a grosgrain reinforcement. This helps to strengthen the tent fabric in high stress areas where the fabric is under excessive tension or areas with bar tacks.
Low stress doors. SlingFin designs its doors differently than other tent companies. We modify the door patterns so there is extra fabric on the inner portion of the door. This reduces zipper slider and zipper chain stress when the tent is dry and extra taught. This may make the door look slightly loose while the tent is in humid environments but the loss of aesthetics is minor as compared to the functionality, ease of use and durability one gets with the low stress door design.
Titanium Dioxide window covers. (BFD, LFT, Last Resort, High & Mighty). All clear windows on SlingFin tents, made with ET70 fabric, have a window cover made of ET70. While our clear window film is very durable it is not as UV resistant as ET70.
WebTruss™. Designed to make any tent stronger and easier to set up. Please see the image and extended description of the Web Truss for more information. Please click here.
Reflective Guy Outs. All guy-out loops have a reflective strip.
Grommet tab guides for tents with different pole lengths. The BFD has 15 poles with 3 different lengths. The LFD has 10 poles with 2 different lengths. Each grommet tab is labeled S (short) M 9 (medium) or L for (long) to make pitching these tents easier than ever. If the poles are all the same length then there are no pole size labels (Last Resort, High & Mighty and the One Up).
Reflective sleeve openings on WebTruss™. All WebTruss™ sleeve openings have a reflective strip of grosgrain which makes pitching your tent in the dark easier than ever.
Tent tube. All SlingFin tents are equipped with Easton® Expedition grade 7075-T9 tent tube. Easton aluminum tent tube is hard anodized and has the highest yield strength available in the industry. For more detailed information on Easton tent poles Please click here.
Back Tacking and Bar Tacking. All stress points are reinforced with extra fabric or grosgrain and sewn with a bar tack or reinforced by back tacking the stress area. Back tacks are most commonly applied to stress areas that would be damaged by a bar tack machine.