What is Parawood? What is Chili Pepper? Allergy potential? Does the mattress rest on slats? What is that material? What is the spacing between slats? Is there a rim or rail? My mattress ia 39"W x 76"L will it fit this frame? or be unsupported in some places? Doe the parts fit together with bolts? THANKS

Chili Pepper is the name of the bed model. Every style has a unique name from this manufacturer. The bed is solid wood so it is unlikely you will have allergies. The mattress rests on the slats. Your twin mattress will fit on the frame. The frame is slightly larger than a mattress to allow room to tuck in the bedding. Yes, the side rails are bolted to the end panels. The slats are screwed into the frame to keep them from moving. The slats are approximately 2" apart. We have a large showroom in Redwood City, CA for you to see this in person. We have the twin in stock.