WARNING! Only 8 slats are included, 4 per bed. Additional packs of 18 slats, Item# HBEE2278, or bunkie boards MUST be purchased separately when using regular mattresses. It is safe to use bunkie mattresses with 4 slats per bed. The mission of the Mission twin over twin bunk bed is to maximize your floor space in style and comfort. It is the perfect solution for sleeping two in the footprint of one. The Mission's 100% solid wood Brazilian pine construction makes it safe‚ durable‚ and aesthetically pleasing. It is enriched by a stain finish which gives a silky-smooth feel. The Mission comes in five colors as well as a twin over full version (Item# HBEE1191) and can be paired with other perfectly compatible furniture pieces from Palace Imports. Also helping to complete your mission of worry-free sleep is our one-year limited warranty.