Permanently valid. Wantley belt is a kind of lumbar support produced by KOWA Xinghe in Japan, which can relieve the strain and protrusion of lumbar intervertebral disc. It is unisex and suitable for exercise and fitness. According to the inquiry, the Wantley belt is a kind of waist-tightening and abdomen-tightening belt made of cloth, which has no service life and can be used permanently. Validity period: refers to how long the validity period is, and it will be invalid after the validity period.