Intravehicular Activity Clothing Study (IVA Clothing Study) - 07.18.14
ISS Science for Everyone
Science Objectives for Everyone
The Intravehicular Activity Clothing Study (IVA Clothing Study) dresses crewmembers in commercially available lightweight clothes that have been designed to resist odors. There is no laundry in space, so dirty garments are discarded aboard ISS cargo resupply spacecraft. Sufficient cotton clothes for a crew of six add more than 900 pounds of freight to the International Space Station. Replacing crew clothes with non-cotton apparel, such as polyester, wool, and modacrylic, reduces weight for cargo launches and trash removal, while providing crewmembers with comfortable, longer-lasting clothes.
Science Results for Everyone
OpNom IVA Clothing Study
Johnson Space Center, Houston, TX, United States
Sponsoring Space Agency
National Aeronautics and Space Administration (NASA)
Technology Demonstration Office (TDO)
ISS Expedition Duration
March 2014 - March 2015
Previous ISS Missions
Clothing accounts for over 900 pounds for an ISS crew of six for a year. Traditional cotton garments also contribute to lint generation causing clogging of air filters and increased cleaning.
- The study tests the length of wear and crew response to light weight, germ resistant, commercially available clothing.
Clothing launch and trash mass will be reduced, providing crewmembers with comfortable, long lasting clothing.
ISS Science Challenge Student Reflection
Crewmembers wear exercise study t-shirts and shorts for 15-day study periods, one ground-based period and one in-flight period. For exercise periods, which are just cardiovascular and aerobic, a polyester or Merino wool t-shirt and polyester shorts will be worn. Additionally, for a 15-days in-flight study period, crewmembers also have routine wear t-shirts of either modacrylic or Merino wool.
All t-shirts and shorts are hung up to dry out and then stowed away when not in use during the 15-day study periods. A questionnaire, taking five to ten minutes, is completed at the end of each day for the routine wear t-shirt and after each exercise period for the exercise wear t-shirt and shorts. If a t-shirt or shorts are deemed no longer acceptable for wear, then that item will be withdrawn from use and a new study item will be put in use. For the ground-based component, all t-shirts and shorts are returned to representatives of the principal investigator. For the in-flight component, used t-shirts and shorts are discarded.
Eliminating cotton reduces the production of lint, which can clog the air filters on the International Space Station. Longer-lasting and lighter-weight clothes reduce storage and launch requirements for crewmember apparel, which brings down costs. Clothing with antimicrobial properties helps to eliminate odor problems.
Crewmembers exercise in commercially available shirts and shorts repeatedly, until they deem the clothes no longer acceptable to wear. The longer useful life of some of the test clothing could be advantageous in areas of the world where washing clothes is difficult.
Crewmembers wear the exercise shirt and shorts only during cardiovascular exercise sessions. This may include Treadmill2 (T2), Cycle Ergometer with Vibration Isolation and Stabilization System (CEVIS), or Treadmill with Vibration Isolation Stabilization System (TVIS) hardware. The exercise clothing is hung up to dry for up to three hours and then stored in flame-resistant bags. A questionnaire is taken daily soon after exercise to document perception of the exercise clothing and at the end of the day to document perception of the routine-wear shirts. Routine-wear shirts are worn during all nominal activities. If a PAO event or another event requires a different shirt to be worn, it is worn over the provided routine-wear shirt.
- Crewmembers wear the provided exercise shirts and shorts during cardiovascular exercise sessions for a 15-day study period using the following equipment: Treadmill2 (T2), Cycle Ergometer with Vibration Isolation and Stabilization System (CEVIS), or Treadmill with Vibration Isolation Stabilization System (TVIS).
After each exercise session, the garments are hung up to dry for three hours, and then placed in flame-resistant bags for storage until the next day.
A questionnaire is taken after the exercise session to document perception of the garments.
The same garments are worn on subsequent study days until the crew member does not deem them acceptable to wear.
Fresh garments are used for the following exercise session.
Routine-wear shirts are provided to the crewmembers participating in the 15-day study to wear during nominal daily activities.
At the end of each day, a questionnaire is taken to document perception of the shirt.
The shirt is re-worn on subsequent days until it is deemed unacceptable at which time a fresh shirt is put on.