The Front Strap Kit is a replacement product that works for all USWE backpacks using the NDM 1 harness.

XS-Mapproximately76-112 cm/29-44 inchesin chest circumference

M-XL(Standard Size on all models) approximately84-120 cm/33-43 inchesin chest circumference

L-XXLStrap is approximately104-140 cm/41-55 inchesin chest circumference