Abstract. The d-dimensional Slepian Gaussian random field {S(t), t ∈ R d+ } is a mean zero Gaussian process with covariance function ES(s), and under the sup-norm on [0, 1] 2 which implies Talagrand's result for the Brownian sheet. The method of proof for the sup-norm case is purely probabilistic and analytic, and thus avoids ingenious combinatoric arguments of using decreasing mathematical induction. In particular, Riesz product techniques are new ingredients in our arguments.