my two danner pairs, bought at different times, are marked "15660X" and "NSN 8430015636897", which tracks to Federal Supply Classification
FSC 8430 - Footwear, Men's
National Item Identification Number
NIIN 015636897
Codification Country
United States
Item Name Code
INC 01826
they are comfortable and durable. they work very well except on ice and other slick surfaces.