The Sierra Collar
 
These Collars are made with premium certified climbing rope making them the strongest rope collars we do, although we never reccomend walking your dogs on these collars and we suggest you use these as ID collars only 
 
VERY IMPORTANT - These collars can not be adjusted, please ensure you put the correct neck size when checking out, we will make the collar to the exact measurments you put, please leave slack when measuring your dogs neck to ensure its not too tight