Why should the hot water bag into outstanding twill
Mainly in order to avoid a large area of contact with the skin caused by burns, but also a certain anti slip effect.
The surface of the hot water bag is made into a convex twill to keep warm and prevent scald.
With anti scald + anti slip effect! Anti scald: making contact with the human form of twill "after the bag is changed, when no twill is surface contact made of twill after a line contact! Change the contact area changes the moment obtained from the heat on the bag body! So as not to be burned, in addition to this form increases the heat dissipation area to help heat!
