  We reconstruct derived Witt groups via special linear algebraic cobordism.
There is a morphism of ring cohomology theories which sends the canonical Thom
class in special linear cobordism to the Thom class in the derived Witt groups.
We show that for every smooth variety X this morphism induces an isomorphism
between MSL^{*,*}(X)[h^{-1}] with the "extended" coefficient ring
MSL^{4*,2*}(pt) -> W^{2*}(pt) and Laurent polynomial ring over the derived Witt
groups W^*(X), where h is the stable Hopf map. This result is an analogue of
the result by Panin and Walter reconstructing hermitian K-theory using
symplectic algebraic cobordism.
