1. Parasols, rain umbrellas, umbrellas
The main difference between parasol and umbrella is in function:
The main functions of parasols are UV protection, sun protection, and skin health protection;
The main function of the umbrella is to resist wind and rain;
The sun umbrella has the sunshade function of a sun umbrella and the waterproof and windproof function of an umbrella.
Tip: When buying a sun umbrella, be sure to ask the seller if the sun umbrella you want to buy can be used as an umbrella, or it will leak when it rains. Beauties should pay attention to this.
2. UPF value
The UPF value is the UV protection factor value. Just like buying sunscreen, when buying a sunshade, pay attention to the UPF value of the umbrella. When the UPF is greater than 30, it can be called anti-ultraviolet product, and the protection level standard is “UPF30+”. If you are in the south, a parasol with UPF>50 can be your whitening secret; if you are in the north, a parasol with UPF>45 is also very sufficient.
Reminder: UPF value is enough, don’t just listen to sellers fooling around. In addition, it is best to ask the seller to show the inspection report for the umbrella with high UPF, especially online shopping, to prevent waste of money.
3. Vinyl, silver, nano
Nowadays, most umbrellas on the market are made of vinyl. Compared with vinyl, silver glue has the disadvantages of being easy to fall off and having a general sun protection effect (UPF>30). The light transmittance of high-quality vinyl can reach almost 0, Inferior vinyl coating may contain carcinogens, causing harm to the body. The principle of nano-coating is to reflect ultraviolet rays by smearing half-wavelength of ultraviolet rays on the umbrella cloth.
Another point is that the current vinyl umbrella is divided into two types: outer vinyl and inner vinyl. I personally think that the internal vinyl will be better. If the vinyl is white, it will shading, and the inner coating will better protect the vinyl. Secondly, everyone knows that black is the easiest to absorb heat. If the outer picture is vinyl, it will increase the external temperature of the umbrella.
Tip: The key to UV protection lies in nano-coating. Vinyl only has a shading effect (sunscreen is not black, haha). For the purchase, the outer side of the umbrella cloth is nano, inner vinyl> outer vinyl, inner nano> nano Coating>Silver glue.
4. Single layer, double layer
For parasols and sun umbrellas, the sunshade and cooling effect of double-layer umbrellas are better than single-layer umbrellas, and the fabric on both sides certainly feels better than the single-layer fabric. But please note that, as mentioned above, the anti-ultraviolet rays mainly rely on nano-coating, and the double layer only improves the effect of blocking the sun.
In addition, there is also a double-layer heat-insulating umbrella that hides the ribs on the market. A hollow drum is formed between the double-layers, which can produce a greater degree of heat insulation and bring better heat insulation.
Tip: Double-layer>single-layer, a “boneless” umbrella with hollow drums between the two layers is better, but it is not always available.