BS 8432:2005 gives guidance on the design of spinal orthoses. It is intended for designers of orthoses, clinicians prescribing orthoses for patients, orthotists, and manufacturers of both commercially available and custom-made orthoses for individual patients. This standard is not applicable to sacro-iliac orthoses (Sb), that is, orthoses that encompass the whole or a part of the sacro-iliac region of the trunk.