Comparison Doppler 71763BU vs Doppler 74166

The presence in the design of the umbrella of reinforced elements and additional parts that provide protection from strong winds. Note that the essence of such protection is not so much the prevention of eversion, but the ability to withstand bad weather without breaking. In other words, most storm umbrellas can easily turn inside out, but they endure this trouble without any consequences and easily return to normal working shape. And the wind directed from the outside, they resist much better than ordinary ones. Therefore, if you often have to be outside during heavy rains with strong winds, it makes sense to pay attention to models with this function.

Material from which the umbrella frame is made. In this case, "frame" primarily refers to the central rod, although the ribs are often made of the same material if not specified otherwise (see "Rib Material").

— Steel. One of the most popular options among modern umbrellas. Steel offers good strength and elasticity. It's worth noting that different types and grades of this material can be used in umbrellas, so the actual characteristics of a specific steel frame are directly related to the price category of the product. Nevertheless, steel is used even in high-quality premium-class models. Among its "global" drawbacks is its rather considerable weight.

— Aluminum. Aluminum alloys used in umbrellas are noticeably lighter than steel but less durable. They can also have different characteristics, usually directly related to the price category of the respective model. However, in general, this material is considered less reliable and thus is mostly found in entry-level and mid-range umbrellas.

— Fiberglass. Fiberglass combines corrosion resistance, elasticity, and stable performance in cold conditions: in gusts of wind, such ribs spring back to give the canopy its shape without "bending memory," and they withstand moisture and salty mist without coatings.

— Carbon fiber. A carbon fiber frame provi...des maximum rigidity with minimal weight, precise maintenance of the canopy’s geometry, and resistance to moisture and salt mist. In gusty winds, such a frame sways less, quickly returns the canopy to its original position, and is therefore in demand in premium storm and golf umbrellas, as well as ultra-light travel models. The durability is directly dependent on the quality of the resin, the evenness of the coating, and the precision of the joints. Therefore, manufacturers use protective lacquer and UV stabilization; carbon is more sensitive to point impacts and stress concentrators, breaking "dry" without long warning bends.

— Wood. Wood has an attractive appearance but is weaker than metal. Therefore, it is mainly used as a design material in some cane umbrellas (see "Type")—even in such models, typically only the central rod is made of wood, while the other parts are metallic.

The material from which the umbrella's ribs are made. It may differ from the frame material (see the corresponding section), which is why this parameter is listed separately.

— Steel. One of the most common materials for ribs. Modern umbrellas may use different grades of steel, varying in price and quality; typically, this aspect directly correlates with the umbrella's price category. However, in any case, this material is quite strong, flexible, reliable, and durable, and is relatively inexpensive. The main disadvantage of steel is its comparatively large weight.

— Aluminum. Compared to steel, aluminum is distinguished by a lower weight on the one hand, and relatively low strength on the other. Consequently, it is relatively rare, mainly found in children's umbrellas and budget "adult" models.

— Fiberglass. Fiberglass ribs combine high flexibility, corrosion resistance, and cold resistance: in strong winds, such ribs spring back and restore the canopy shape without a "bend memory," and do not become brittle in freezing temperatures. This has led to their popularity in storm and golf umbrellas, as well as urban walking canes prioritizing wind resistance. In comparison: with steel, fiberglass is noticeably lighter and does not rust, but falls short in "edge stiffness" and is more likely to break than bend under critical impact; with aluminum, i...t excels in elasticity and resistance to inverting, avoiding permanent folds, although it might be slightly heavier at equal stiffness; relative to carbon fiber, fiberglass is more ductile and "tougher" against impact, cheaper and thicker at the same level of stiffness, while carbon is lighter and stiffer for premium storm models but more expensive and breaks "on snap," without warning deformations.

— Carbon Fiber. Carbon fiber ribs have the maximum stiffness-to-weight ratio: the canopy maintains its shape better in gusty winds, "flutters" less and returns to its original position more quickly with a compact rib diameter. The material is resistant to corrosion but requires high-quality resin and protective lacquer for UV resistance and micro-crack prevention at the joints. This solution is found in premium storm and golf umbrellas, as well as ultra-light travel models, where minimal weight and precise geometry are important. Compared to fiberglass, carbon fiber is noticeably lighter and stiffer at the same thickness, providing better wind resistance and sharper edge shape, but is less ductile and breaks without warning bends when overloaded, also being more expensive; fiberglass is more elastic, tolerates frequent inversions and targeted impacts better, though with a slight loss of "sharp" stiffness.

The diameter of the umbrella dome when unfolded. The larger the diameter of the dome, the more reliably it will protect you from rain and the easier it will be to place one more person under the umbrella. On the other hand, a wide umbrella can be uncomfortable in tight spaces — for example, in the flow of pedestrians on a busy street — and when folded it will take up more space. Therefore, it does not always make sense to choose the largest of the available options.

The minimum diameter for an "adult" umbrella (see "Destination") is considered to be about 80 cm. Most models are in the range of 90 – 110 cm — this provides a good degree of protection with ease of movement. And in the largest modern products, the diameter of the dome can reach 150 cm.

The length of the umbrella when folded. For the decomposed one, this parameter is not specified, because is not critical, but when transporting a closed umbrella, it is the length that is the most important dimension.

The length of cane umbrellas (see "Type") is, by definition, the same when open or closed; most often it is 60 – 90% of the dome diameter (see above). But folding models of the same diameter can vary markedly in length, and here the choice depends on the situation: on the one hand, more compact umbrellas are more convenient to carry, on the other hand, they are less reliable and more complex in design, and also cost more.

— Plastic. As a material for umbrella handles, plastic is very practical: it has a low price, is resistant to moisture, and its strength, although lower than that of metals, is quite sufficient in this case, especially since there are many varieties of this material on the market, including number and are very durable. It is also worth noting the low thermal conductivity of plastic — it does not "cool" the hand in cool weather. Similar handles are used in umbrellas of all price categories.

— Tree. Wood, like plastic, does not conduct heat well and does not cool the hand, while many consider it more pleasant to the touch; Yes, and this material looks quite stylish. At the same time, wooden handles are somewhat more expensive, and their quality noticeably depends on the price category of the umbrella (although in a cheap product, the frame is more likely to break than the handle).

— Skin. In this case, of course, we are talking about a handle made of hard material (usually wood or plastic, see above), covered with genuine leather. Such a coating gives the pen a rich and solid appearance and well emphasizes the image of the owner — after all, leather is quite expensive. Of the practical disadvantages of this option, it is worth noting the exactingness of care — otherwise the material may lose its presentation.

— Metal....Metal handles are usually an integral extension of the central rod. They are very durable, besides they look stylish, but they tend to "cool" the hand and slip out of it — therefore they are rarely used, mainly in designer models.

— EVA foam. Handles in the form of a solid base (usually the same material as the frame), covered with a layer of ethylene vinyl acetate (EVA) foam. This coating is pleasant to the touch, does not slip in the hand and provides a secure hold. At the same time, for a number of reasons, this option is found mainly in premium models.

Total weight of the umbrella.

All other things being equal, lighter umbrellas are more convenient to carry (both in the open and closed positions). On the other hand, such products are less reliable and/or more expensive than relatively heavy models of similar design and size. We also note that in some cases, significant weight can be an advantage. For example, in a strong wind, a massive umbrella does not “tear from your hands” as much, and when released, it does not fly as far as a lighter one.