Few things are as important in a bass guitar as the quality of its neck. It not only influences the instrument's tone directly, but is also a deciding factor when it comes to playability. One of the biggest challenges when it comes to neck construction is the considerable tension of the strings on the instrument. Consequently, we take particular care that our necks perform optimally under the tension of bass strings, and retain their stability for decades. This is why Warwick neck constructions consists of a minimum of three tone wood laminations that are glued together lengthwise.
http://warwick.de/en/Warwick---Company--Our-unique-instruments--Our-necks-and-fretboards--Our-neck-laminations.html