Benks · Waterproof Phone Cases
Amazon.com: Benks - Cell Phone Cases & Covers: Cell Phones & Accessories
Skip until Benks discloses materials and PFAS status.
Benks phone cases lack public material transparency and make no PFAS claims. Without disclosed composition or third-party testing, PFAS risk cannot be assessed.
We flunk more products than we pass. This one earned its grade. How we grade
Material
TPU, silicone, or plastic shell (unspecified by brand)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Amazon.com: Benks - Cell Phone Accessories is made of, ingredients and materials
Benks cases are listed as TPU (thermoplastic polyurethane), silicone, or unspecified plastic shell. TPU and silicone are both elastomeric polymers with low established leaching risk under normal use conditions (room temperature, no prolonged contact with food or beverages). The specific resin formulation, colorants, and any additives are not disclosed by Benks. Without material safety data sheets or third-party testing, the presence of heavy metals in pigments or problematic plasticizers cannot be ruled out.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Heavy metals
Colored TPU and silicone cases rely on synthetic dyes or pigments; cadmium, lead, or antimony in colorants is not reported for Benks specifically, but absence of material disclosure means it cannot be excluded. Risk is negligible if the case is uncolored or light gray.
Source, FDA ↗Phthalates
If the case uses PVC rather than TPU or silicone, phthalate content is a concern. Benks' product pages do not specify which polymer is used in each SKU, making it impossible to definitively rule out legacy plasticizers. TPU and silicone formulations can also contain alternative plasticizers of lower toxicological concern.
Source, ATSDR ↗Volatile organic compound (VOC) off-gassing
New TPU and silicone cases often emit a characteristic chemical odor in the first days to weeks of use, consistent with residual solvents or unreacted oligomers. This is typically low-level and resolves with ventilation but may be problematic for users with chemical sensitivity or asthma.
Thermal degradation and additive migration at high temperature
TPU softens around 60-70 degrees Celsius and silicone around 150 degrees Celsius; if the case is left in a hot car or near a heat source, additive migration into skin or onto the device screen may occur. Benks does not publish thermal stability data.
What’s reassuring
Microplastic shedding from wear and degradation
No reports of microplastic generation from Benks cases. Elastomeric materials are less prone to fragmentation than rigid plastics, but degradation over years of use is inevitable and shedding risk is inherent to polymer materials.
How is this PFAS grade calculated?
The brand's record and disclosure
Benks provides no publicly available material safety documentation, certifications (such as FCC, RoHS, or material transparency commitments), or PFAS disclosure on product pages or corporate policy. The brand has not issued statements on chemical safety or sustainability standards. No recalls or safety incidents specific to Benks cases have been widely reported, but the absence of proactive disclosure is a transparency red flag in an industry where competitors increasingly publish material specifications.
How it compares in its category
Phone cases are among the lower-risk consumer products because they do not contact food or drinking water and are exposed to skin only briefly and intermittently. TPU and silicone cases are generally preferred over PVC (which may contain phthalates) and hard plastics with unknown composition. However, many competitors (e.g., Spigen, OtterBox, Casetify) now publish material certifications or environmental commitments; Benks' silence on this front places it in the less-transparent segment of the market.
If you buy it
Avoid prolonged contact with skin in hot conditions; TPU can soften at elevated temperatures and may release volatile compounds if exposed to direct heat or sunlight for extended periods. Do not expose to harsh solvents, oils, or perfumes, which can degrade elastomeric materials. Wash hands after extended use if skin irritation develops. Replace the case if it becomes sticky, discolored, or develops an unusual odor, which may indicate degradation or additive migration.
What is not known about PFAS in this product?
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Benks has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Amazon.com: Benks - Cell Phone Cases & Covers: Cell Phones & Accessories?
- Flax fiber and plant-based resin blend, compostable
- A third party reports verifying it as PFAS-free
- Coating degradation and durability over time
2 hazards checked on this product, all on its full breakdown.
- plant-based bioplastic (flax and other plant fibers)
- A third party reports verifying it as PFAS-free
- Thermal degradation and warping
3 hazards checked on this product, all on its full breakdown.
- Plant-based bioplastic (compostable blend)
- A third party reports verifying it as PFAS-free
- Bioplastic degradation and microparticle shedding
More waterproof phone cases grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.