Conductive yarn in a textile weaveConcept illustration
14 evidence trails03 patent applications
Evidence trails
Follow a claim to its source.
Open a question to see the method, reported findings, limitations and original references.
01MethodologyHow does the fabric sense changes?+
Fibra describes yarn-based sensors integrated into the underwear. Its published applications describe designs for sensing pH and how a liquid dries on conductive threads.
What the sources describeThe pH application describes a coating on conductive yarn. A separate application describes measuring a liquid as it dries. The broader wearable application shows how a biochemical sensor can form part of the system.
How to interpret itThese documents explain proposed sensor designs. They do not give a clinical accuracy figure for a finished garment.
02Signals & interpretationWhich signals does Fibra track?+
Fibra lists five inputs: discharge pH, discharge volume, skin temperature, heart rate and heart rate variability. The product pairs the garment with a detachable module and an app.
What the sources describeFibra’s technical and testing pages name the inputs. NOW Toronto and JMIR describe how the garment and app work together.
How to interpret itA physiological signal and an app estimate are different measurements. The public sources describe a consumer wellness use.
03Wear testingHow much wear testing has been reported?+
JMIR reports that the team collected 500,000 minutes of beta wear over two years. Founder coverage also reports more than five million data points during development.
What the sources describeThe team used real-world wear to refine the garment. The figures describe time worn and data collected, two different measures of development activity.
How to interpret itWear minutes and data points do not identify the number of independent participants or establish prediction accuracy. JMIR published this as a news feature.
04Garment careWhat supports the washability claim?+
Founder Parnian Majd says the garment withstood more than 60 wash cycles in company testing. Fibra’s engineering page describes separate care for the garment and its detachable module.
What the sources describeIn her USA Wire interview, Majd discusses garment wash testing. Fibra describes checking continued safety and function after defined washing conditions.
How to interpret itThe reported cycle count applies to the tested conditions. Follow the care instructions for the garment and removable electronics.
05Safety & testingHow were the electronics evaluated?+
Fibra describes internal checks on moisture protection, wearer-accessible current, and battery charging and protection. Selected IEC 60601-1 requirements inform these checks.
What the sources describeThe engineering summary describes normal and defined fault conditions, controlled charging, overcharge protection and short-circuit protection.
How to interpret itFibra identifies this as internal benchmarking for a consumer wellness product. It does not present this testing as medical-device certification or regulatory approval.
06Research & collaborationsWho has contributed to development?+
Fibra describes research collaborations on yarn sensors, biosensors and validation. Toronto Metropolitan University separately documents the incubation support that helped the company develop.
What the sources describeFibra names university research groups on its technology page. TMU describes its own entrepreneurship support. York University published the abstract for Majd’s smart-textiles keynote.
How to interpret itCompany-reported research collaborations, incubation support and a hosted talk are different forms of involvement.
07Results & limitationsWhat evidence is public about cycle insights?+
Fibra describes combining sensor readings with cycle history to estimate cycle timing in its app. MaRS records the founder’s plans for possible perimenopause applications.
What the sources describeThe Fibra engineering page describes the app inputs. The MaRS interview distinguishes the existing fertility focus from the founder’s vision for a future application.
How to interpret itThe linked public material does not supply a finished-product accuracy estimate with a sample size, reference method and results. Fibra describes its intended use as wellness.
08Company & commercial historyWhere are Fibra’s milestones documented?+
Femtech Insider reported a US$1.25 million pre-seed round in 2024. Two Small Fish Ventures published its investment rationale, and TriMech recorded Fibra’s 2024 MAKO award. The Innovation World Cup organizer names Fibra its 2026 US Public Vote Winner.
What the sources describeThe funding announcement, the investor’s account and the award organizer’s announcement document separate parts of the company’s history.
How to interpret itUse the named sources to verify financing, recognition or company history. Product performance is addressed in the testing records above.
Milad Ghalamboran, Judith Castillo-Rodriguez, Camille Anne Javonillo, Sina Tahbaz, Bryan Koivisto, Gerd Grau and Parnian Majd
RSC Applied Polymers · 15 July 2025 · DOI: 10.1039/D5LP00036J
Fibra-affiliated researchers tested printed temperature sensors on fabric and glass. Over 23–40 °C, the fabric sensor showed a sensitivity greater than 0.65% per °C and an approximately 20% change in resistance.
What the sources describeThe team measured the electrical response as temperature changed. The reported fit between temperature and resistance was R² = 0.779 on fabric and 0.995 on glass. The paper describes the fabrication and experimental methods.
How to interpret itThese are component measurements. The sensitivity is the change in electrical resistance per degree, not temperature accuracy, fertility-window accuracy or a result from a trial of the finished product.
11Material safetyWhat is public about skin-contact material testing?+
In a published interview, founder Parnian Majd describes laboratory testing in Germany on the fabric sensors for skin sensitivity and material safety.
What the sources describeThis is the founder’s public account of material testing. The electronics tests are described separately in Fibra’s engineering summary.
How to interpret itThe interview does not give a laboratory report number, test protocol or specimen-level results. It does not establish that every wearer will tolerate the garment.
12Product comparisonsHow does the sensing approach compare?+
Fibra describes measuring pH-related and discharge-pattern signals in the garment alongside temperature, heart rate and heart rate variability. Natural Cycles describes an approach centred on temperature and supports compatible wearables.
What the sources describeThese descriptions are based on each manufacturer’s information and refer only to the named products.
How to interpret itFeature differences do not establish comparative accuracy, regulatory equivalence or a market-wide exclusivity claim.
Fibra describes a detachable, rechargeable electronics module. Its specification lists up to four days of battery life.
What the sources describeThe duration is a manufacturer-stated upper limit. The public specification does not detail the recording mode, connection interval, test load or number of devices used.
How to interpret itActual time between charges depends on usage. These sources do not establish a typical runtime or guarantee a particular duration.
14PrivacyHow does Fibra describe its handling of data?+
Fibra’s privacy policy explains which readings the system may process, how cycle estimates are generated, and how to request deletion.
What the sources describeRead the current policy for its scope, safeguards and contact details. The policy distinguishes sensor readings from model estimates.
How to interpret itThis record documents the company’s published practices. It is not a third-party security audit.
