Constructed with high density woven elastic cinch straps, the Lumbar Lock is designed to provide consistent, long-lasting performance. 2-way-stretch power knit elastic forms the body of the support. Hook and loop closures give positive lock and highly adjustable sizing. Primary belt width increases with belt size for best fit. The number of orthopedic boning stays and length of the stays increase with belt size for strong custom support. Triple-locking cinch strap provides extra support for planned lifts or when navigation trickier surfaces such as on construction sites. Adjustable shoulder straps, machine washable.