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Bullstrap logo with the tagline 'enjoy your journey'
Bullstrap logo with the tagline 'enjoy your journey'
A brown leather iPhone case with a bull logo
The Flex Case - SIENNA
Close-up of the Minimalist Case showing TPU protective rim and buttons
The Flex Case with TPU bumper for protection, featuring options for minimalist and contemporary designs.
The Flex Case - SIENNA
The Flex Case - SIENNA
The Flex Case in Sienna color, showing the back and front of the case.
The Flex Case in Sienna color with precision camera control cut-out
A hand holding the Flex Case in SIENNA color, showcasing its leather texture and design.
A brown leather iPhone case with a logo, placed on a white surface next to a pen and a camera.
Close-up of the Flex Case - SIENNA showing closed bottom design with charging port.
A person holding the Flex Case - SIENNA phone case, partially inserted into their pocket.
Close-up of the SIENNA Flex Case showing buttons and camera cutout
Close-up of the Flex Case in Sienna color with a card slot, resting on rocky surface.
A person holding the Flex Case in SIENNA color with a card slot, showcasing its design and functionality.
A person holding the Flex Case in SIENNA color, showcasing its leather texture.
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A brown leather iPhone case, wallet, and accessories on a beige surface.
Comparison of the Flex Case - SIENNA, fresh out of the box vs. after 180 days of use.
Close-up of The Flex Case in SIENNA color, showing seamless leather-to-TPU design with camera cutout.
The Flex Case - SIENNA
$20
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4TH OF JULY
15% OFF THE WHOLE STORE
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See it in Action
Introducing the Bullstrap Flex Case, where our classic luxury leather meets stylish and sleek durability for your everyday use. Crafted with precision from 100% full grain leather on the back and fortified with a shock-absorbent TPU rim, this case offers unparalleled protection and style. All Bullstrap iPhone 16 cases now come with the option of either a precision cutout or a state-of-the-art touch glass button specifically designed for the Camera Control feature. MagSafe Compatible, Protective, & Sleek.  Important! This case is designed specifically to work with our new MagSafe Charging Cable! Get yours here! FINAL SALE - Cases marked as final sale will not be covered by our Lifetime Warranty or eligible for returns/exchanges.  
Leather

- Hides sourced from Europe and northern United States

- Chrome tanning process

- Full-Grain leather with natural variation in texture

- Lightly buffed and dyed with water-based dyes

- Sprayed with oils and waxes for enhancement effects

- Polished to achieve a two-tone color effect

Features

- N52 strongest grade magnets

- TPU bumper construction for maximum case durability and drop-protection

- 316-L Monochromatic Stainless Steel Buttons

- Microfiber inside lining for debris protection

- Badass Bullstrap logo embossed into leather



For Cases with a Camera Control Button:

- Aluminum Button

- PCB Sensing Panel

- Touch Glass Panel

- Soft Link Combination

Comparison of Bullstrap cases versus other cases, highlighting confidence, quality, warranty, and craftsmanship.

GOES TOGETHER WITH:

A hand holding the Flex Case in SIENNA color, showcasing its leather texture and design.

THE REAL STUFF.

100% full-grain leather. No fake "pleather", no BS!

Bullstrap's Founder talking about The Flex iPhone cases.

Before
After

PATINA PROUD

100% FULL-GRAIN LEATHER

pa·ti·na - the natural aging process that occurs on the surface of leather products over time. As leather is exposed to elements such as light, air, and handling, it develops a unique, rich sheen and darkens in color. This change is often considered desirable because it enhances the leather's character and beauty, giving it a distinctive, lived-in appearance.

A person holding the Flex Case - SIENNA phone case, partially inserted into their pocket.

MAGSAFE COMPATIBLE.

Designed to work with all MagSafe accessories, but, it works especially well with the Bullstrap MagSafe Wallet (sold separately).

A brown leather iPhone case with a logo, placed on a white surface next to a pen and a camera.

VERSATILE APPEAL.

Whether you're in the office or traveling, the Flex Case offers reliable protection without sacrificing style, ensuring your device remains safe wherever you go.

Close-up of the bottom of the Bullstrap Flex Case showing the charging port and speaker holes.

PREMIUM LEATHER WITH A TWIST.

Experience luxury with the Flex Case, meticulously crafted from 100% full grain leather and seamless protection.

FAQ:

Is this product really covered by a Lifetime Warranty?

Yes, it’s real. And it’s awesome. If you want to read some legal nonsense, you can learn more about our Lifetime Warranty by clicking the link at the bottom of this page. But suffice it to say, we’ve got you covered.

Do the Flex cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

How does the Flex case differ from the Minimalist case?

The main difference is protection! The shock absorbing TPU rim on the Flex case will protect not only your phone, but also the full-grain leather backing from getting torn on the sides. Other than the sides, the phone case are both MagSafe compatible and made with the highest quality leather on the market.

Do the MagSafe cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

What is the reason for adding the TPU bumper all around the case?

We added this extra protection to prevent ripping/tearing on the edges of your case! We understand leather and while it may be beautiful, it sometimes doesn't withstand being dropped on concrete. That's why we made this case. for those who want the look of a leather case with also the protective characteristics of a plastic case!

Is this product really covered by a Lifetime Warranty?

Yes, it’s real. And it’s awesome. If you want to read some legal nonsense, you can learn more about our Lifetime Warranty by clicking the link at the bottom of this page. But suffice it to say, we’ve got you covered.

Do the Flex cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

How does the Flex case differ from the Minimalist case?

The main difference is protection! The shock absorbing TPU rim on the Flex case will protect not only your phone, but also the full-grain leather backing from getting torn on the sides. Other than the sides, the phone case are both MagSafe compatible and made with the highest quality leather on the market.

Do the MagSafe cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

What is the reason for adding the TPU bumper all around the case?

We added this extra protection to prevent ripping/tearing on the edges of your case! We understand leather and while it may be beautiful, it sometimes doesn't withstand being dropped on concrete. That's why we made this case. for those who want the look of a leather case with also the protective characteristics of a plastic case!

Is this product really covered by a Lifetime Warranty?

Yes, it’s real. And it’s awesome. If you want to read some legal nonsense, you can learn more about our Lifetime Warranty by clicking the link at the bottom of this page. But suffice it to say, we’ve got you covered.

Do the Flex cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

How does the Flex case differ from the Minimalist case?

The main difference is protection! The shock absorbing TPU rim on the Flex case will protect not only your phone, but also the full-grain leather backing from getting torn on the sides. Other than the sides, the phone case are both MagSafe compatible and made with the highest quality leather on the market.

Do the MagSafe cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

What is the reason for adding the TPU bumper all around the case?

We added this extra protection to prevent ripping/tearing on the edges of your case! We understand leather and while it may be beautiful, it sometimes doesn't withstand being dropped on concrete. That's why we made this case. for those who want the look of a leather case with also the protective characteristics of a plastic case!

Is this product really covered by a Lifetime Warranty?

Yes, it’s real. And it’s awesome. If you want to read some legal nonsense, you can learn more about our Lifetime Warranty by clicking the link at the bottom of this page. But suffice it to say, we’ve got you covered.

Do the Flex cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

How does the Flex case differ from the Minimalist case?

The main difference is protection! The shock absorbing TPU rim on the Flex case will protect not only your phone, but also the full-grain leather backing from getting torn on the sides. Other than the sides, the phone case are both MagSafe compatible and made with the highest quality leather on the market.

Do the MagSafe cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

What is the reason for adding the TPU bumper all around the case?

We added this extra protection to prevent ripping/tearing on the edges of your case! We understand leather and while it may be beautiful, it sometimes doesn't withstand being dropped on concrete. That's why we made this case. for those who want the look of a leather case with also the protective characteristics of a plastic case!

Is this product really covered by a Lifetime Warranty?

Yes, it’s real. And it’s awesome. If you want to read some legal nonsense, you can learn more about our Lifetime Warranty by clicking the link at the bottom of this page. But suffice it to say, we’ve got you covered.

Do the Flex cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

How does the Flex case differ from the Minimalist case?

The main difference is protection! The shock absorbing TPU rim on the Flex case will protect not only your phone, but also the full-grain leather backing from getting torn on the sides. Other than the sides, the phone case are both MagSafe compatible and made with the highest quality leather on the market.

Do the MagSafe cases have a lock magnet?

Yes! It’s the magnetic line under the circle of magnets to help it stay in place and not spin around.

What is the reason for adding the TPU bumper all around the case?

We added this extra protection to prevent ripping/tearing on the edges of your case! We understand leather and while it may be beautiful, it sometimes doesn't withstand being dropped on concrete. That's why we made this case. for those who want the look of a leather case with also the protective characteristics of a plastic case!

100% Real Leather Covered by a lifetime warranty Icon of a hand holding a dollar sign with a circular arrow, indicating a 45-day money back guarantee.

COVERED FOR LIFE.

And we mean it. Read more about our exclusive lifetime warranty below.

Learn More