defined via slicing the classical tent space norm at a fixed height. Recall that, for any $q,\ r,\ t\in(0,\fz)$, the *slice space $(E^q_r)_t(\rn)$* in [@ap] is defined as the space of all locally $r$-integrable functions $f$ on $\rn$ such that $$\label{slice}
\|f\|_{(E^q_r)_t(\rn)}:=\lf\{\int_\rn\left[t^{-n}\int_{B(x,t)}|f(y)|^r\,dy\right]^{q/r}
\,dx\right\}^{1/q}<\fz.$$ In particular, $E^q_t(\rn):=(E^q_2)_t(\rn)$ was introduced in [@am]. A subspace $(\mathfrak{C}_r^q)_t(\rn)$ of $(E^q_r)_t(\rn)$ was also introduced in [@ap] in a way similar to $\mathfrak{T}^q_r(\rr_+^{n+1})$ (see also Definition \[auscher\] below). These slice spaces $(E^q_r)_t$ and $(\mathfrak{C}_r^q)_t$ were proved in [@ap] to be the *retracts* of the tent spaces $T^q_r(\rr_+^{n+1})$ and $\mathfrak{T}^q_r(\rr_+^{n+1})$, respectively. They are also special cases of the Wiener-amalgam spaces (see [@f]) which were first introduced by N. Wiener and further developed in time-frequency analysis and sampling theory. Properties of slice spaces such as the duality, the atomic decomposition and the interpolation were also clarified in [@am; @ap]. Observe that the Hardy type space $(\mathfrak{C}_r^q)_t(\rn)$ \[and also $\mathfrak{T}^q_r(\rr_+^{n+1})$\] was introduced in [@ap] via atoms and *no other real-variable characterizations* of these Hardy type spaces are known so far.

Let $\Phi$ be an Orlicz function on $[0,\fz)$ and $q,\ t\in (0,\fz)$. Motivated by the aforementioned works, in this article, we first introduce a class of Orlicz-slice spaces, $(E_\Phi^q)_t(\rn)$, which 