The strap of this type of bra straps is from T.M Series. T.M Series contain two type of tape: clear transparent TPU tape and semi-transparent one. Compared with B, D, S Series TPU tape, semi-transparent TPU tape from T.M Series will not be added frosted particles.
As to the feature of TPU material, TPU bra straps have some elasticity. When kept in right way, the bra straps won't get yellowing in 3 years.