This is a 1/2" MIL spec kevlar mesh sleeve designed to create custom looms.
The sleeve is slightly expandable to let you slide the loom in. It is highly abrasion resistant, sustains continuous heat up to 650F/ 350c and direct flame exposure for 5 seconds.
Here is a flame test conducted with the hose protecting low temperature PVC insulated servo cable.
The sleeve complies with fire/ flammability standardsMIL STD 202.
Sells by the foot