【Diamond Shape Quilting】The mattress is sewn into a diamond shape with fine stitches. There are Three layers: cover + quilting + high-density base support foam + quilting, which adapt to the human body structure curve and relieve physical fatigue. The quilted mattress is suitable for bedroom, floor, guest room, tent, teepee 【Ideal for Almost Occasion】Twin futon mattress measures (80"L x 39"W x 4"Th). The futon mattress could be used as bedroom futon mattress, floor mattress, carpet, tatami pad, also could be guest bed or tent mattress 【Strongly Supportive Mattress】 The futon mattress adopts double layer tape edge runs along the edges of the mattress surface, protecting against edge break-down. High side edge reinforces the support along the outer edges of the mattress.4in（10cm） thick, reinforced comfortable support 【Floor Mattress Fabric】The Cover is high-quality polyester, the inner filling is polyester and high-density base support foam. A layer of additional padding sewn on top of a mattress to make it soft and improve circulation by reducing pressure points 【Care Instructions】We recommend periodically turning over and rotating the mattress to prevent body impressions. Additionally, it is advisable to dry the floor mattress in the sun regularly to maintain its fluffiness 【Important Tip】 Please note that the mattress may have a temporary lump in the middle due to compression during packaging. No need to worry as this will naturally disappear after the mattress is laid flat on the floor for a few days 4" Japanese Floor Futon Mattress, Twin Size Foldable Floor Mattress - Memory Foam Sleeping Pad for Adults - Tatami Mat Suitable for Camping & Guest -Diamond Grey