● The connecting construction (snap-together) that is free from sliding part minimizes the generation of dust.● Link-against-link friction noise, which is generated when links are traveling, is significantly reduced, thanks to use of soft material of low percussive noise.● The structure of a hard material frame combined with a soft material frame prevents rigidity reduction, which is incidental to soft material based products.● Flaps are made of same material as Plarailchain SP series, making it possible to further increase rigidity while decreasing cable abrasion. The flap opens at both sides. It is also removable.