10 is dyed and washed alternatively splitting agent such as superfine teflon may be added to the first material 13 or the second material 14 thus the filaments of the first material 13 are easily split from the filaments of the second material 14 as the wristband 10 is dyed and washed alternatively the first material 13 or the second material 14 is made via mixing 20 80 of amorphous polymer with 80 20 of crystal polymer thus the contractibility of the first material 13 is much higher than that of the second material 14 or vice versa hence the filaments of the first material 13 are easily split from the filaments of the second material 14 as the wristband 10 is dyed and washed in hot water alternatively the first material 13 and the second material 14 may be molten at carefully calculated temperatures thus the stickiness of the first material 13 to the second material 14 is low hence the filaments of the first material 13 are easily split from the filaments of the second material 14 as the wristband 10 is dyed and washed the mechanical step is taken in the spinning of the compound yarn 11 in the mechanical step the compound yarn 11 reeled at a rate of 3000 8000 meter per minute thus the first.