The backrest and armrests of this upholstered daybed are wrapped in velvet, providing a soft and delicate touch that enhances overall comfort and visual appeal. Velvet material is not only elegant and durable, but also can create a warm home atmosphere. The soft package structure effectively buffers body pressure, making one feel relaxed whether sitting or lying down for a long time. It is suitable for leisure, reading or taking a short rest. Whether used as a sofa or a bed, it can provide an excellent user experience and meet modern people's demand for comfortable furniture. This daytime bed is equipped with a pop-up trundle that supports seamless expansion from twin size to king size, greatly enhancing the practicality and flexibility of the bed. Users can quickly adjust the size of the bed according to their actual needs to adapt to different scenarios of use, such as temporarily receiving guests or daily rest. To facilitate users' adjustment of trundle, it is equipped with wheels and handle assistance straps. The expansion process is simple and convenient, does not occupy additional space, and perfectly solves the problem of limited home space. The bed frame is made of a sturdy metal frame, ensuring the overall structure is stable and durable, and capable of withstanding various pressures during daily use. At the same time, in combination with the plywood slat system, it provides uniform support for the mattress, enhancing its load-bearing capacity and comfort. This day bed integrates a sofa, a bed and an extension bed into one, and is suitable for various scenarios such as living rooms, studies and bedrooms. Its compact design effectively saves space and is particularly suitable for small-sized apartments or multi-functional rooms. Through flexible expansion and convenient mobility, it meets the usage needs of family members at different times.