Functional underwear is necessary for comfort during sports, leisure and work activities. Its main function is to transport sweat into the upper layer of clothing so the user doesn’t feel like he or she is wearing a “wet T-shirt”. This effect is achieved by a combination of materials creating a yarn so as to increase the capillary forces in the textile structures and parts of clothes according to the specific needs of the moving body. The category of functional underwear includes thermowear and functional socks.

Among other abilities, functional underwear can have antibacterial qualities and the ability to absorb odours or even the effects of insect repellent.


Features for support of physiological comfort

  • The ability to transport perspiration (MMT, BPI)

Thermoregulation properties

  • Transmittance of heat and vapours

Mechanical properties

  • The change of dimensions and appearance after washing maintenance
  • Determination of pilling

Colour fastness

  • Colour fastness to perspiration
  • Colour fastness to washing
  • Colour fastness to rubbing

Health – hygienic properties

  • Testing of selected indicators of health - hygienic properties (formaldehyde, pH, heavy metals, aromatic amines)
  • Antimicrobial properties
  • Completion of selected quality parameters
  • Maintenance symbols (pictograms for washing, ironing, drying, etc.)
  • Integrity of manufacturer's information of properties (if applicable)
  • Improperly selected maintenance procedure leading to product damage
  • Low colour fastness
  • Decline of „functional characteristics" caused by repeated maintenance
  • Inappropriate use of emollients - softener
  • CEN/TR 16422 Classification of thermoregulatory properties
  • EN ISO 15831 Clothing – Physiological effects – Measurement of thermal insulation by means of a thermal manikin
  • EN ISO 12947-2 Textiles – Determination of the abrasion resistance of fabrics by the Martindale method – Part 2: Determination of specimen breakdown
  • EN ISO 12945-2 Textiles – Determination of fabric propensity to surface fuzzing and to pilling – Part 2: Modified Martindale method
  • EN ISO 11092 Textiles – Determination of physiological properties – Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded - hotplate test)
  • EN ISO 9237 Textiles – Determination of the permeability of fabrics to air
  • EN ISO 6330 Textiles – Domestic washing and drying procedures for textile testing
  • AATCC TM-195 Liquid moisture management properties of textile fabrics

Colour fastness:

  • EN ISO 105-X12 Textiles – Tests for colour fastness – Part X12: Colour fastness to rubbing
  • EN ISO 105-E04 Textiles – Tests for colour fastness – Part E04: Colour fastness to perspiration
  • EN ISO 105-C06 Textiles – Tests for colour fastness – Part C06: Colour fastness to domestic and commercial laundering

Health – hygienic properties:

  • EN ISO 20645 Textile fabrics – Determination of antibacterial activity – Agar diffusion plate test
  • EN ISO 20743 Textiles – Determination of antibacterial activity of textile products
  • AATCC TM 100-2012 Antibacterial finishes on textile materials: Assessment of
  • ASTM E 2149-13a Standard test method for determining the antimicrobial activity of antimicrobial agents under dynamic contact conditions
  • EN ISO 14184-1 Textiles – Determination of formaldehyde – Part 1: Free and hydrolysed formaldehyde (water extraction method)
  • EN ISO 3071 Textiles – Determination of pH of aqueous extract
  • EN ISO 15586 Water quality – Determination of trace elements using atomic absorption spectrometry with graphite furnace
  • EN 14362-1 Textiles – Methods for the determination of certain aromatic amines derived from azo colorants – Part 1: Detection of the use of certain azo colorants accessible without extraction


Contact for information about testing outdoor functional underwear:

Don't hesitate to contact us for more information.

Ing. Petr Nasadil

Testing laboratory manager
+420 543 426 730
Textile Testing institute