Smartphones are thinner and more delicate than ever, yet we still want to use them freely outdoors. After years of product design and real-world testing, Bone chose eco-friendly silicone for its balance of protection, comfort, and durability.
— Why Silicone Works for Everyday and Active Protection
Smartphones keep getting slimmer and more advanced. Bone asked whether one material could feel comfortable in daily use while still providing reliable cushioning during cycling and running.
The answer is eco-friendly silicone—a simple material that reshapes how protective accessories work and feel. With its flexibility, durability, and stretchability, silicone turns an ordinary phone accessory into a protective structure designed for different activities.
Three silicone protection solutions from Bone (Image source: Bone)
1. Beyond Hard Cases: How Silicone Absorbs Impact
Good smartphone protection is not only about resisting scratches and external impact. It must also absorb and disperse force before that energy reaches the device. Silicone adds the flexibility and cushioning that rigid materials may lack.
1. Blind Spot: Impact Transfer Through Rigid Cases
Rigid plastic cases provide strong scratch protection and structural support. Without a flexible cushioning layer, however, less impact energy can be absorbed through material deformation.
Silicone can flex slightly on impact, helping absorb and distribute force around the corners, edges, and other vulnerable areas of the phone.
2. Solution: Flexible Cushioning That Absorbs Impact
Silicone’s polymer network structure allows it to act like a soft cushion. When a phone is dropped, the material deforms slightly to absorb and disperse part of the impact, creating a physical shock-absorbing structure.
Its soft texture and reliable grip also increase friction between the phone and the hand, helping reduce accidental slips before an impact even occurs.
Bubble corners add both style and protection (Image source: Bone)
2. Bike Tie: Flexible Support Against Road Vibration
On a bike, the challenge is to hold the phone securely while reducing the amount of road vibration transferred to the device. The elasticity and cushioning properties of silicone help Bike Tie achieve both.
1. Challenge: Road Vibration and Precision Camera Systems
During extended rides, vibration from rough pavement, bumps, and uneven roads travels through the bicycle frame and phone mount to the device.
For smartphones equipped with precision cameras, autofocus systems, and optical image stabilization, reducing vibration transfer is an important part of phone-mount design.
2. Solution: Flexible Silicone Support
Bike Tie creates flexible silicone contact between the phone and handlebar. It holds the device firmly while helping absorb and disperse road vibration.
The material’s stretchability also allows Bike Tie to accommodate different phone sizes, thicknesses, and camera layouts. Its high-elasticity attachment structure maintains flexible compatibility, even when the user changes phones.
Flexible silicone helps disperse road vibration and protect the phone (Image source: Bone)
3. Run Tie: Secure Support and Breathable Comfort
During marathons and high-intensity training, repeated arm movement can make a phone bounce, slip, or feel uncomfortable. Silicone provides secure support while helping reduce movement during exercise.
1. Pain Point: Slipping, Movement, and Sweat Buildup
Some fabric or hook-and-loop armbands may loosen after extended use or heavy sweating. This can interrupt the runner’s rhythm and increase the risk of the phone slipping out.
Sweat-absorbing materials may also cause heat buildup, odors, and cleaning issues. Limited airflow between the phone, armband, and skin can further reduce wearing comfort.
2. Protection: Secure Support and Better Airflow
Run Tie uses reinforced silicone straps with reliable stretch and grip to securely fit smartphones from 4.7 to 7.2 inches, helping reduce the risk of slipping during exercise.
Its flexible dual-layer structure follows the natural curve of the arm, absorbs movement, and distributes pressure for a close and stable fit.
The inner airflow channels help release heat and moisture, reducing sweat buildup between the phone and skin. The removable and washable elastic armband also makes cleaning easier after exercise.
The dual-layer structure follows the arm for a secure and comfortable fit (Image source: Bone)
4. Durable by Design: Longer Use and Less Waste
Beyond physical protection, silicone also supports a design approach focused on extending product life and reducing unnecessary replacement. Accessories that are durable, washable, and reusable can help reduce waste caused by short-term wear.
1. Stability: Designed for Outdoor and Everyday Use
Silicone offers good elasticity, physical stability, and weather resistance. It can handle outdoor exposure, temperature changes, sweat, and frequent daily use.
With appropriate material selection and structural design, silicone accessories can maintain stable support and protection over an extended period.
2. Sustainability: Longer Use and Less Short-Term Waste
Silicone is a synthetic material based on a silicon-oxygen structure, offering good durability, elasticity, and weather resistance.
Compared with accessories that become brittle, lose their shape, or require frequent replacement, durable and washable designs can extend the product life cycle and reduce unnecessary waste.
An integrated design with fewer components also lowers the chance of replacing the entire product because one part becomes damaged.
Bubble Magnetic Phone Case for the iPhone 17 series (Image source: Bone)
5. Better Material Design for Simpler Protection
Silicone is more than an outer protective layer. It creates a flexible buffer between the smartphone and the surrounding environment, while providing a soft and reassuring touch.
From everyday phone cases to Bike Tie for cycling and Run Tie for running, Bone uses eco-friendly silicone to balance protection, comfort, and durability across different activities.
Through durable, washable, and long-lasting designs, these accessories also help reduce unnecessary replacement and waste. Simple materials can often provide the most thoughtful and dependable protection.