  We propose a class of models, in which stable gravastar with large surface
redshift becomes a solution. In recent decades, gravastars have become a
plausible substitute for black holes. Researchers have explored stable
gravastar models in various alternative gravity theories, in addition to the
conventional framework of general relativity. In this paper, we present a
stellar model within the framework of Einstein's gravity with two scalar
fields, in accordance with the conjecture proposed by Mazur and Mottola [Proc.
Nat. Acad. Sci. \textbf{101} (2004), 9545-9550]. In the model, the two scalar
fields become non-dynamical by imposing constraints in order to avoid ghosts.
The gravastar comprises two distinct regions, namely: (a) the interior region
and (b) the exterior region. We assume the interior region consists of the de
Sitter spacetime, and the exterior region is the Schwarzschild one. The two
regions are connected with each other by the shell region. On the shell, we
assume that the metric is given by a polynomial function of the radial
coordinate $r$. The function has six constants. These constants are fixed by
the smooth junction conditions, i.e., the interior region with the interior
layer of the shell and the exterior region with the exterior layer of the
shell.
  From these boundary conditions, we are able to write the coefficients of the
scalar fields in terms of the interior radius and exterior radius. To clarify
the philosophy of this study, we also give two examples of spacetimes that
asymptote as the de Sitter spacetime for small $r$ and as the Schwarzschild
spacetime for large $r$. Exploration is focused on the physical attribute of
the shell region, specifically, its proper length.
