Low back pain
Back strain
Nylon
Polyester
Cotton
Rubber
Steel stay
S 58-70cm 23-27 1/2 ''
M 70-85cm 27 1/2 -33 1/2 ''
L 85-100cm 33 1/2-39 1/2 ''
XL 100-110cm 39 1/2 -43 1/4 ''