Merax Twin Over Full Bunk Bed with Ladder & Safety Rail - Converts to 2 Separate Beds, Space-Saving Grey Bed Frame - Perfect for Kids' Rooms, Guest Rooms & Small Spaces" （注：这个优化标题包含了： 1. 核心关键词重复（bunk bed, twin over full） 2. 重要功能点（convertible, safety rail） 3. 颜色属性 4. 使用场景说明 5. 符合Google SEO的标题长度（约70字符） 6. 用&符号替代"and"节省空间 7. 添加了"space-saving"等用户搜索词）

【2 Bunk Beds in 1】This bunk bed features one twin size loft bed and one full size bottom bunk for accommodating your child or any overnight sleepers. Convertible to 2 separated beds. No spring box needed

【Modern and Sturdy Bed Frame】The bed structure is crafted from high-quality solid pine wood solid pine legs and a strong, durable frame so that the bed is sturdy and durable

【Space-Saving Bunk Loft Bed】The bunk bed takes up minimal space for the spontaneous sleepover guest. Functional and aesthetic, this bunk bed will enhance any bedroom. Space underneath can be used for storing staff to maximize efficiency

【Designed for your child’ s safety】The upper loft bed features a full-length guardrail. This bunk bed ensures top-notch security for your child. What’ s more, the solid legs that made of solid pine wood can add strength and durability

【Dimension and Weight Capacity】Dimension: Upper Bed-- 42.4’’ x 75.9’’ (W x L). Down Bed-- 55.9’’ x 78.7’’ (W x L). Total Height: 62.3’’. Weight Capacity: 200lbs for Top Bunk, 400lbs lbs for Bottom Bunk. Recommended Mattress Thickness: Upper bed: 6'', Bottom bed: 8'' - 10''