  Given a simple algebraic group $G$, a web is a directed trivalent graph with
edges labelled by dominant minuscule weights. There is a natural surjection of
webs onto the invariant space of tensor products of minuscule representations.
Following the work of Westbury, we produce a set of webs for $\SL_n$ which form
a basis for the invariant space via the geometric Satake correspondence. In
fact, there is an upper unitriangular change of basis to the Satake basis. This
set of webs agrees with previous work in the cases $n=2,3$ and generalizes the
work of Westbury in the case $n\geq 4$.
