: While infants require extra-firm surfaces to prevent SIDS, toddlers (ages 2+) benefit from medium-firm support. This level is firm enough to maintain proper spinal alignment while offering pressure relief for growing joints.

: Look for mattresses with ventilation channels or materials like natural latex and cotton . These features help regulate the body temperature of toddlers, who often run "hot" during sleep.

: Strong perimeter support is vital for toddlers who sit on the edge to put on shoes or for parents sitting beside them for storytime.