Virtual Customer Support
At DUI, we love talking to divers. We get all kinds of questions about our products and about diving in general. Some questions are more common than others. Since we can’t be available all the time, we’ve compiled a list of a few of the most common questions, and their basic answers. You can also email our Customer Support Team and we will get back to you promptly.
All DUI drysuits are made in the USA offering you the fastest delivery possible.
DUI drysuits fit better than anyone else. We use our 40+ years in designing custom garments for divers and are constantly testing and updating patterns and designs to improve the fit of our equipment. DUI suits are designed to provide you complete range of motion while the least amount of drag possible.
DUI uses only the best materials.
DUI drysuits are hand-made by skilled craftsman.
DUI offers the best warranty in the industry – 7 years against defects in materials and workmanship. And we’ve been in business since 1963 and are here to support that warranty.
DUI offers the best customer service in the industry. You have a question? Call us. We are here to help you.
DUI drysuits out perform all others. They are more comfortable, more durable, more reliable.
It’s all in the details – we add drain holes in areas so the suit drains faster, we add zipper guards to not only protect the waterproof zipper but it makes the suit look better, knee overlays cover the length of the leg, edges are finished, thread colors match, etc. etc. etc.
Dive for dive, DUI drysuits actually cost less! That’s right. Because DUI drysuits are more comfortable, you will dive more. You can dive all year round and multiple times a day. Dive anytime you want and wherever you want. And by varying the insulation underneath, you can dive from warm to very cold waters. That means you only need one suit. And with proper maintenance, DUI drysuits can easily last ten years. That all equals up to one fact: DUI actually costs less!
All of the best divers dive DUI. Look around. What are the world’s top divers wearing? Underwater photographers, explorers, scientists, commercial, public safety, recreational – they are ALL wearing DUI.
TEST DIVE FOR YOURSELF! Try one for yourself. Dive another brand of drysuit and then dive a DUI. No other drysuit can match the fit, the feel and the comfort of a DUI.
As briefly mentioned above, all DUI suits excel in different aspects, that is to say, for any given dive, they have pros and cons. In choosing a suit it is important to think about what you are looking for in a drysuit and under what conditions it will be used.
The series of questions that follow contrast the features and benefits of our more popular suit styles.
The CLX is also available in many material combinations if ordered as a Special Production drysuit. For example, you can have the tough Cordura material used in the lower half of the suit as well. That will make the suit even more durable though you will lose some flexibility as the Cordura material is more stiff than the regular trilaminate material. You can also order a CLX drysuit with a CF200 bottom – a CLX50/50.
Both the TLS and CLX are available in a self entry and shoulder-entry design
The CF200 is available in both a self-don and shoulder-entry version. The FLX50/50 is only available in a self-don version.
The key to selecting from among these suits is determining which features are most desirable to you and your diving activities.
A Signature Series is a made to measure suit. In addition to choosing the color, boot style and size and seals, there are additional upper body design choices for most of our drysuit styles.
DUI has over 50 options in pockets, pads, overlays, seals, valves and more in which to choose. These can be installed on all DUI drysuits.
DUI offers the best fit in the industry. Period.
Making a Signature Series is a delicate balance between tailoring to fit, while minimizing the number of suit seams. Fewer seams mean greater suit longevity. Conversely, the greater the degree of the tailoring, the greater the number of suit seams, and the shorter the longevity. For example, if a diver has a large buttocks yet thin legs, the size of the hips will dictate the size of the legs. That is to say, the legs can only be tapered a certain amount and still unite with a common seam at the waist. Tailoring to exactly fit such a diver would require substantially increasing the number of seams, thus diminishing the expected longevity, for minimal effect on actual dive performance.
Similarly, an “hourglass” waistline is not a viable design, given that the waist can only be tailored to a certain point. When putting on and taking off a drysuit, the hips must pass through the waist area, and an hourglass configuration is simply not favorable.
As technology improves, DUI will continue to improve its sizing process and procedures, DUI is recognized as the world leader in drysuit research and development.
With the QuickZip, most of those failures have disappeared. However, some divers are accustomed to, and still prefer the Classic zipper style so it is still available on Select, Special Production and Signature Series drysuits. When ordering one of these suits if you prefer the classic zipper, please specify this in the notes section of the order form.
The diver and dealer will need to sign a Cave Cut Agreement which outlines the potential limitations of such a cut including some restriction of movement, increased wear on seams and limitations on wearing thicker insulation under the suit. This suit is not usually a good choice for someone with larger shoulders and/or overall body size as they may find a disproportionate amount of restriction when moving.
Call your dealer or DUI for more information on whether this type of design is right for you.
While there is no such thing as equipment that will protect the diver under all circumstances, DUI has suits made out of many different materials, and we are happy to work with dive teams to develop appropriate decontamination and maintenance procedures.
Please consult our manual on “Risk Management through Advanced Technology for Public Safety Divers” or contact DUI or one of our Authorized Public Safety Dealers for more information.
Thinsulate Liteloft will be warmer on the surface as its high loft is excellent for cold surface conditions. That high loft means that underwater the compression will decrease its insulative effectiveness to that of somewhere between the 200 and 400g Thinsulate.
Polartec PowerStretch 300 is the most popular insulation DUI makes and when you see how stretchy and comfortable this jumpsuit is you will understand why. Its high density, compressed two-way stretch Polartec is very soft and light but almost as warm as Thinsulate (400g) Ultra. Its low bulk and form fit means you will need to wear less weight than Thinsulate 400 Ultra and layering for additional thermal benefit (avoid cotton fabrics) works well.
We use one way stretch fleece in our value-priced ActionWear insulation. This fleece is more bulky than the PowerStretch insulation. Given its limited ability to stretch, these undergarments must allow some additional fabric to accommodate complete range of motion. However, it is much less expensive than the other insulation so it is a great option that provides a lot of warmth at a lower price.
DUI also has the StretchLiner 100 which is great by itself for warm waters or as an additional layer for colder waters.
Please see the articles in our tech info section of the website on insulation for more information.
DUI DiveWear Care Instructions are available here.
If you have a head diameter larger than 23 ½” you may have trouble donning a suit with a neck ZipSeal as the ring itself is only 24” in circumference. You will want to try one on at a DUI dealer or DOG Rally & Demo Day prior to purchase.
All divers can enjoy the benefits of the ZipGloves which come in 3 styles for all your diving needs. Switching between wrist seals and gloves is quick and easy with the ZipSeal system. You don’t know what you are missing. Warm and dry hands are amazing, and easier than ever to use!
Some divers like the extra security of having a backup wrist seal inside the glove which is available as well. These gloves, called the ZipGloves-WD (wrist dam) are also available in two thicknesses. You will need to trim the wrist dam inside the glove to ensure a proper fit.
Compressed neoprene ZipGloves are also available for those divers who want the extra durability of compressed neoprene. These gloves come with a slightly thinner liner as the gloves themselves have some inherent warmth.
If you don’t have ZipSeals, you can still use the SI-Tech glove system sold by DUI. This system includes two rings: one installed on the suit and another on the glove. The system does have the advantage of allowing you to don the gloves after the suit but it can be difficult to make sure both gloves are sealed properly. You will also have a large, hard ring on the wrist when using the gloves.
In addition, DUI’s SI-5 system glues a hard ring to the suit that can then be used to convert between wrist seals and dry gloves. This system is often used by public safety divers as it is easier to adapt non-DUI gloves to the ring.
DUI also offers the Dry5 Glove System which is a dry glove with a latex wrist seal. The latex wrist seal is sealed over the top of the wrist seal on the drysuit. Divers will often leave a straw or DiveWear thumb loop underneath the seal allowing the glove to equalize with depth. The first glove is fairly easy to install yourself yet you will need assistance from your buddy for the second!
Washing the seals with soapy water after use can also extend their life by removing potentially harmful deposits and body oils. Everyone is different and some people will experience more problems than others.
The last thing to watch for is the way you don and remove the seals. Latex can stretch further when stretched sideways than lengthwise so always stretch the seal to the side before sliding it over the hand or head. That will lessen stress cracks that may appear on the surface of the latex at the junction between the suit and the seal.
It is obvious that drysuits are exposed to changes in hydrostatic pressure. However a less obvious force at work which can potentially loosen the valves are temperature changes. Material expands and contracts with changes in temperature and drysuits can experience a wide range of temperatures.
EN 14225 Part 2: Dry Suit – Requirements and Test Methods: This standard states that the drysuit must be able to withstand temperature ranges from 20°C (-4°F) to 70°C (158°F). Though the diver typically experiences water temperatures between -2°C (28°F) and 30°C (86°F), the -20°C (-4°F) to 70°C (158°F) represents storage temperatures. While many suits will not see the -20 °C (-4°F) storage temperature the 70°C (158°F) is a typical automobile trunk temperature. In fact the U.S. Department of Transportation puts the average summertime trunk temperature at 80°C (176°F). So it easy to see that your drysuit can see a wide temperature swing depending on storage temperatures and diving activity.
Many manufactures use rubber valve ports/grommets which appear to be convenient and they count on the compression of the rubber and friction between the valve and these ports to keep the valves in place. However temperatures change between storage temperatures and diving temperatures plus the addition of shock and vibration can work the valve loose over time. For these reasons manufacturers attach hang tags to the valve of their new suits warning the diver to check the installation of their valve before each dive. While it is prudent to check all your equipment before diving it seems unreasonable for the diver to carry the proper wrenches to check and insure the valves are always properly installed in the drysuit.
WARNING!!! Verify that the drysuit inlet and outlet valves are tight BEFORE EVERY DIVE. Your valves can become loosened during the course of normal use from rotation of the valve and material compression. A loose valve may leak or become dislodged during your dive causing your suit to flood and lose buoyancy. This could create a potentially dangerous situation.
DUI is continually reevaluating the use of ports and grommets and their ability to maintain the valve securely in the drysuit over a wide temperature range both in storage and in use.