This is the Massif Flamestretch Sock System. Consisting of two socks, the Massif FR sock is worn over a Darn Tough Merino wool micro crew lightweight sock as a liner. The Massif Flamestretch fabric is highly breathable and traps heat to keep your feet warm, while Merino’s properties for moisture management are widely known.
It is currently worn under drysuits in applications where FR is critical.
Approved by NAVAIR
Authorized by the United States Coast Guard
USAF Authorized Safe-To-Fly
Units and agencies can procure products seen at ADS Federal Range Day by contacting ADS, Inc.