Classic Brands Instant Foundation Low Profile 4-Inch Box-Spring Replacement, Twin XL Easy to assemble instant foundation is a low-cost solution that provides perfect support for today's higher profile mattresses Strong and sturdy foundation supports today's heavier mattresses including Memory Foam and Latex beds and actually increases the mattress's longevity by preventing sagging Low profile foundation is durable, noise-free, and offers easier access to those who may have difficulty getting onto a higher bed (mattress, frame, and headboard sold separately) Handcrafted of solid spruce in the USA by the Pennsylvania Amish Package delivers to your doorstep and fits easily through tight hallways or narrow stairwells Ready for assembly; most tools and easy to follow instructions are included 5 Star Customer Service; Available 7 days a week