I've been wearing the one on the right since february or something, then after a couple of months clipped the one left of that onto it in it's "raw" state and just today clipped the 3rd, fresh one on (this is how they all started). What you get is a long bracelet that wraps around my wrist 3 times and shows 3 different stages of aging/evolution.
Here's a post I made in May when had only worn one thus far.

BLESS leather bracelet worn daily since February 24th, compared with a brand new one.

Worn for roughly a year, every day.
Suntanned and oiled when new.

For comparison, picture with the same belt but from the current collection, 95% sure that the same leather was used.