Heavy-Duty Steel Frame for Ultimate Safety: Sturdy metal structure supports up to 150kg, resisting overturning even with active toddlers. Unique curved lower rail eliminates gaps between the mattress and rail, preventing entrapment while ensuring a secure fit for king/queen size beds Height-Adjustable & Single-Side Lifting Design: 66cm–103cm height adjustment suits growing toddlers (1–5 years), while the unilateral lifting system lets parents easily place/remove kids without disassembling the rail—ideal for middle-of-the-night routines Breathable Fabric & Easy-Clean Material: Soft, bite-resistant textile cover is machine-washable , paired with a rust-proof steel frame for long-term use. Cute cartoon patterns add a playful touch to nursery decor Tool-Free Installation with Dual Lock System: Quick 5-minute setup with labeled parts and clear instructions. Dual locks secure the rail to the bed frame, ensuring stability without damaging mattresses—perfect for box springs, platform beds, or waterbeds Space-Saving 3-Piece Design for Full Bed Protection: Two 200cm side rails + one 150cm headboard rail create a 3-sided barrier (total coverage 550cm), ideal for king size beds. Built-in storage pocket holds bedtime essentials like books or pacifiers, keeping the bed clutter-free