
【Smartphone cases for adults】How to choose items that show off your sense of style?
Just like fashion and makeup, many people want to be particular about their smartphone cases.
By choosing a smartphone case that is functional as well as has a good design and texture, you will naturally show off your adult dignity.
In this article, we will focus on "smartphone cases for adults" and introduce some points to consider when choosing, the differences in impression depending on the material, and recommended products. We hope you will use this as a hint to find the perfect smartphone case for you.
Points to consider when choosing a smartphone case for adults

To choose a smartphone case that exudes a mature look, it is important to pay attention to the design and durability.
Here are some specific points to consider when choosing a smartphone case.
Simple design
A simple design is one of the important points when choosing a smartphone case for adults.
A simple and sophisticated design is easy to use in any situation and gives a stylish impression.
It will suit any scene, whether business or private, and will subtly enhance the sense of the person who owns it.
In particular, the minimalist design with its modest logo and decoration is ideal as a smartphone case that gives off a mature vibe.
Stylish colors
Stylish colors recommended for adults are calm colors such as beige, gray, and navy.
By choosing understated colors that are not too flashy while still being aware of trends, you can give a more sophisticated impression.
It's a good idea to choose a smartphone case in a calm color from a brand that has a wide range of colors.
Can be used for a long time
When it comes to smartphone cases for adults, it's important to consider whether they can be used for a long time.
We do not recommend smartphone cases made of materials that easily show scratches and dirt.
A durable smartphone case that is carefully made down to the smallest details will make scratches and dirt less noticeable and will maintain a clean look.
Choose a smartphone case that is not only stylish but also of high quality, and will remain in good condition even after long use.
The "material" determines the impression of the smartphone case.

The material of the smartphone case is an element that greatly affects not only the appearance and comfort of use, but also the impression it gives.
The durability also varies depending on the material you choose. Here, we will look at the most common materials used for smartphone cases.
Leather
Leather smartphone cases are elegant and stylish, making them a suitable item for adults.
Leather comes in two types: "genuine leather" made from animal skin, and "synthetic leather" made from artificial materials.
The advantage of genuine leather is that it fits your hand better the more you use it, and it is durable and can be used for a long time.
Synthetic leather is characterized by its ability to reproduce the feel of genuine leather and its lower price than genuine leather, but it is less durable and prone to scratches and tears.
Polycarbonate (hard case)
Polycarbonate is a type of plastic, and polycarbonate smartphone cases are also called hard cases.
Clear products give a minimalist and smart impression, so they are popular with adults who value simple beauty.
Although synthetic leather is a hard material and strong, it is prone to cracking when bent, so care must be taken when putting on and taking off the case.
Also, if you use it for a long time, the case may develop fine cracks due to deterioration over time.
Silicone (soft case)
Also called soft cases, silicone smartphone cases are soft and elastic.
Compared to other materials, silicone smartphone cases have a more casual impression, so if you are looking for a smartphone case for adults, you should pay attention to points to consider when choosing, such as a simple design and stylish colors.
Since silicone smartphone cases tend to be statically charged, the disadvantage is that they tend to collect dust when placed in a pocket or bag.
Recommended smartphone cases for adults
Here, we will introduce popular BONAVENTURA products, which are made of high-quality materials and have sophisticated designs, as smartphone cases recommended for adults.
BONAVENTURA is a brand that offers a wide range of high-quality genuine leather items. Choose from a wide range of stylish, highly designed iPhone cases.
In addition, they come in a wide variety of colors and are highly functional, making them popular with iPhone users.
In addition, the leather used in BONAVENTURA's iPhone cases is coated with nano-glass (water-repellent) during the manufacturing process, so the leather itself repels moisture and is less likely to get dirty or stained.
BONAVENTURA's iPhone cases are compatible with a wide range of models.

<iPhone case compatible models>
・iPhone 16 series
・iPhone 15 series
・iPhone 14 series
・iPhone 13 series
・iPhone 12 series
・iPhone 11 series
・iPhone SE (3rd generation, 2nd generation)
・iPhone 8/7/6s/6

Diary Case Shrink Leather
The Diary Case Shrink Leather is a notebook-style iPhone case that covers the front and back.
The inside has five card pockets that can hold credit cards, business cards, bills, etc.
The vertical and horizontal pockets allow you to use it for different purposes. It comes in 20 colors, including solid and bicolor.
The downside of a diary case is that it becomes thick, which impairs its appearance and usability.
However, BONAVENTURA's diary case has a minimalist design that brings out the texture of the high-quality leather, making it a product that we would recommend to adults.

Back cover case Shrink leather
Back cover case Shrink leather is a back cover type iPhone case that covers only the back. It has a card pocket and can store two cards.
It comes in nine colors. With a wide lineup ranging from muted tones to vivid colors, you're sure to find a color you like.
In addition, the shrink leather used in the back cover case is highly durable due to the shrink processing, and can naturally recover from minor scratches. It is a material that maintains elegance and is easy to use while remaining in a clean condition.

Back cover case Noblesse Leather
Back cover case Noblesse Leather is a back cover case Like the Shrink Leather, this is a back cover type iPhone case that covers only the back.
It features a slim design that does not impair the thinness of the iPhone, and in addition to standard colors such as etoupe, greige, and black, it also comes in pale colors such as shell pink, making it popular with adult women.
The Noblesse Leather used in the Back Cover Case Noblesse Leather uses two colors of leather with different tones to achieve a beautiful color with depth. It is also attractive that it is resistant to deformation and durable.

Snap button back cover case shrink leather
The envelope pouch can store cards, coins, bills, and small items such as keys.
The mirror pouch has four card pockets and a mirror, so you can easily check your appearance.
The Shrink Leather Back Cover Case with Snap Button is available in six calm colors that give an adult impression.

Back Cover Case with Handle Shrink Leather
Back Cover Case with Handle Shrink Leather is an iPhone case with a retractable handle.
By putting your finger through the handle, you can hold your iPhone with one hand, and it can also be used as a stand when you turn your iPhone sideways.
You can also attach a shoulder strap (sold separately) to the ring attached to the bottom of the handle and hang it over your shoulder.
It's perfect for those who want to carry their iPhone smartly. In addition, you can attach keys, straps, key charms, and more, making it versatile.
There is also a hidden pocket under the handle that can hold one card, making it extremely functional.

Stand Diary Case Shrink Leather
The Stand Diary Case Shrink Leather is a notebook-style iPhone case with side magnets that close snugly.
It has a card pocket where you can store cards, and can also be used as a stand to hold the diary horizontally when watching videos.
Although it is a simple diary case, it is also highly functional.
In addition, the case is made of shrink leather on the outside and Noblesse leather on the inside, giving it a luxurious feel that makes it a product for adults.
For smartphone cases for adults, choose a simple design and high-quality material
Smartphone cases are important accessories that show off your adult sense because they are items you use every day.
Minimalist designs without too much decoration can create an adult sense of elegance.
In addition to the beauty of appearance, you should also consider ease of use and durability when choosing a smartphone case. A high-quality and durable smartphone case like genuine leather can be used for a long time.
For those looking for a smartphone case for adults, we recommend BONAVENTURA products.
BONAVENTURA offers a wide range of iPhone cases made of high-quality genuine leather from a prestigious, long-established tannery with over 150 years of history.
They feature a sophisticated design that makes them fun to use every day and high functionality. There is a wide variety of colors to choose from, so you can find an iPhone case that suits your taste.
Why not try looking for your favorite item on the BONAVENTURA official website?