▎ 摘　　要

NOVELTY - The utility model claims a module type sponge backrest; the outer sleeve is provided with a slope type sponge block; the upper surface of the slope type sponge block is arc-shaped; the upper part of the gradient type sponge block is negative ion sponge; the lower part of the gradient type sponge block from top to bottom in turn is air-permeable sponge, graphene sponge, bird-eye cloth layer. The utility model has simple manufacturing technique, convenient production and low production cost; It is comfortable to use.