Meet the only neck training system with 4-in-1 benefits for recovery

another muscle takes over the work

The Iron Neck Core Tee is your go-to shirt for training days

tension-causing areas

The muscles in the front

Built Not Born SS BJJ Rash Guard - White Bundles & Packs Meet the only neck trainingEngineered for high performance training, this rash guard combines premium comfort, compression, and durability in a sleek, form fitting design. Whether you're flowing through technique or grinding through live rounds, this rash guard keeps you cool, dry, and focused with sweat wicking fabric and a stay put fit. Details: 81% recycled polyester 19% spandex (U. S. fabric spec) Midweight stretch fabric with compression feel Moisture wicking and fast