Acorn Original "Astronaut" Slipper Sock Size:XS (W's 6.5-7.5) EPA drinking water standards* and

EPA drinking water standards* and NSF protocol P231 testing standard

8 mm suede leather upper

Wipe the blade with a soft cloth if wet and treat with grease occasionally

INSULATION: Removable 9mm felted InnerBoot

which helps keep you comfortable as temperatures rise and humidity increases

Acorn Original "Astronaut" Slipper Sock Size:XS (W's 6.5-7.5) EPA drinking water standards* andAstronaut Approved! From the Smithsonian National Air and Space museum: "Astronauts working aboard the Space Shuttle and International Space Station often wear slipper socks like these. Shoes are not necessary in weightlessness, but crewmembers enjoy the comfort and warmth of soft footwear. Many astronauts simply wear socks as they float around inside the spacecraft. The manufacturer [Acorn] gave these slipper socks to the Museum to use on mannequins