This sturdy, space saving, silver finish 2 tier bed accommodates 2 single mattresses. Mattress depth must not be greater that 1 This sturdy, space saving, silver finish 2 tier bed accommodates 2 single mattresses. Mattress depth must not be greater that 16cm on top bunk.Recommended Mattresses: Health Foam Mattress, Health Foam Deluxe Mattress, Children's Sprung Mattress or Cotton Comfort Mattress ...