Category ceiling
7.3 HIP
This is the best score a product in this category can reach when the maker shares full data about
its materials, supply chain, repairs, and end-of-life. It is a target, not a product on sale today.
HIP Score
7.3/10
Standard
At category baseline (7.3)
Category ceiling: 7.3 HIP
Regenerative Index
-3.0
Extractive
At category average (-3.0)
Category ceiling RI: -3.0
Score Breakdown
How rare are the materials?
MSI · 20%
9.0
Why this score ▸
This item is made mostly from common metals and plastics that are easy to find. It uses a lot of recycled parts and does not rely on rare materials that are hard to get.
Technical detail ▸
The product utilizes primarily abundant materials including recycled aluminium, steel, and ABS plastic with no EU Critical Raw Materials present. High recycled content of 75% and diverse supply sources across the EU and Chile eliminate single-country concentration risks.
Where do the materials come from?
SCR · 18%
6.0
Why this score ▸
The parts come from places with stable rules and safe working conditions. The company has checked where the materials come from to make sure they are safe.
Technical detail ▸
The supply chain sources key materials from Chile and the European Union, regions with stable governance scores, and utilizes the OECD Due Diligence Guidance framework. The presence of a documented alternative supplier and a tier-1 supplier count of four supports a moderate risk rating, though the lack of a specific third-party audit prevents a higher classification.
Can it be recycled?
RC · 18%
8.0
Why this score ▸
You can easily take this product apart to recycle the pieces. Most of the item can be turned into new materials through a program run by the maker.
Technical detail ▸
The product features screw-based disassembly, verified compliance with recycling labels, and an active manufacturer take-back scheme. These factors enable over 80% of the product weight to enter practical recycling streams, aligning with the criteria for well-designed recovery and circularity benchmarks.
Can you fix it?
R · 13%
9.0
Why this score ▸
This straightener is held together with screws so you can fix it yourself. The company promises to sell spare parts for ten years to keep it working.
Technical detail ▸
The product features a fully screw-fastened design with no adhesive on functional components, supported by a 10-year spare parts commitment and a public service manual. An iFixit score of 9 confirms the high level of repairability, allowing for component-level replacement and independent repair.
Is it made fairly?
SEI · 8%
8.0
Why this score ▸
The factory follows strict rules for safety and treating workers well. The makers have checked their work to ensure they care about the environment and people.
Technical detail ▸
The manufacturer holds ISO 14001:2015 and ASI certifications, alongside a completed RBA audit and a modern slavery statement. Production occurs in Germany, an OECD jurisdiction with strong labour law enforcement, and the RBA audit confirms verified good practice for social and environmental management.
How long will it last?
PL · 8%
8.0
Why this score ▸
This product comes with a five-year guarantee and is built to last ten years. You can replace broken parts to keep using it for a long time.
Technical detail ▸
The product achieves an above-average score due to a 5-year warranty and a stated design life of 10 years, which aligns with the premium appliance criteria. The modular design further supports longevity by enabling component replacement. Missing IP rating data is noted but does not prevent the high score given the strong warranty and design specifications.
Does it give back to nature?
RI · 15% · scale −10 to +10
-3.0
Why this score ▸
The item uses a lot of recycled materials and has a plan to get old parts back. It does not yet use materials that help nature grow back.
Technical detail ▸
The product qualifies for the Extractive band minimum of -3 because it contains 75% recycled content and operates a verified closed-loop take-back scheme. It is not Depleting because recycled content is >= 50% with a verified take-back. While the closed-loop programme is active, the absence of Regenerative Organic Certified (ROC) materials or third-party verified ecosystem restoration prevents a score above +5.
MSI 20% · SCR 18% · RC 18% · R 13% · SEI 8% · PL 8% · RI 15% = 100%
About the HIP Methodology ▸
Starting scores are low on purpose. We only count what we can confirm from public data,
so most products sit between 2 and 4 out of 10 before a maker shares their own evidence.
That gap between the starting score and what a product could reach is the whole point.
When a maker proves what their product is really made of, the score goes up.
The HIP Mark shows it has been checked.
Read the full methodology →
Consumer Summary
This hair straightener earns a strong overall score of 7.3 out of 10, showing it is built to last and easy to fix. It also has a Regenerative Index of -3, meaning it uses a lot of recycled materials but does not yet give back to nature. This product is a solid choice that avoids using rare or hard-to-find resources.
What This Means For You
When buying this type of product, look for items that can be easily taken apart with screws and come with long warranties. Avoid products that are glued together or have short lifespans, as these are harder to repair. Choosing items made from recycled materials helps reduce the need to dig up new resources from the earth.
Improvement Opportunities
| Dimension |
Current Score |
Potential |
Action |
| (To be completed after human review) |
— |
— |
— |
Rating History
| Version |
Date |
Score |
Change |
Reason |
| v2 |
2026-06-14 |
7.3 |
7.2 → 7.3 |
methodology_bump |
| v1 |
2026-06-11 |
7.2 |
— |
initial |
How this score was calculated
The HIP Score is a weighted average of seven dimensions measuring material
resilience, supply chain integrity, and end-of-life characteristics.
| Code |
Dimension |
Weight |
Score |
| MSI |
Material Scarcity Index |
0.20 |
9.0 / 10 |
| SCR |
Supply Chain Risk |
0.18 |
6.0 / 10 |
| RC |
Recyclability and Circularity |
0.18 |
8.0 / 10 |
| R |
Repairability |
0.13 |
9.0 / 10 |
| SEI |
Social and Environmental Impact |
0.08 |
8.0 / 10 |
| PL |
Product Longevity |
0.08 |
8.0 / 10 |
| RI |
Regenerative Index |
0.15 |
-3.0 (raw) |
Regenerative Index note: RI scores on a unique scale of -10 to +10.
Before weighting, the raw score is normalised: RI normalised = (RI raw + 10) / 2.
This product's RI band is Extractive.
Weighted HIP Score: 7.3 / 10
· Methodology v1.5
Base weights shown. Some product types use category-specific weight profiles —
see full methodology for details.
Read the full methodology →
Data Sources
This rating draws on the following public sources:
USGS Mineral Resources Program (public domain) · EU Critical Raw Materials List 2023 (CC BY 4.0) · World Bank Worldwide Governance Indicators (CC BY 4.0) · Category default assumptions table v0.1 (provisional — sources pending full citation)
All sources are public domain or published under open data licences.
Full source list →
Rating Version
hair-straightener-ceiling@v2
Published 2026-06-14.
This rating has been updated 1 time since first publication.
Previous versions remain available for reference.
About this rating:
HIP scores are based on public data and information the maker sent us at the date shown.
They show how well a product holds up over time — not a promise about safety or future supply.
Resourcehip is not liable for choices made based on these ratings.
Scope:
This is a verified product rating for Category Ceiling, assessed using manufacturer-submitted data and public category data.
Produced under Resourcehip Scoring Methodology 1.5 (CC BY-NC 4.0).
AI disclosure:
An AI model scored this rating on our own hardware — no data was sent to the cloud.
A human reviewer checked and approved it before it went live.
Model: qwen3.5:35b.
AI transparency notice →
Not financial or investment advice.
Ratings are for consumer information only.
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Assessed: 2026-06-14 · Next review: 2027-06-14 · Methodology 1.5 · hair-straightener-ceiling@v2
