A trundle bed mattress, whether made of memory foam, springs or a hybrid of both is a great space saving option for multi-purpose guest rooms. Here are my picks for the best rated, inexpensive twin mattresses for the both the top mattress and the lower one that slides on wheels to hide under the top. 

This page was put together on the fly for my brother and sister-in-law who are coming to visit us. They've patiently put up with the decades old mattresses in the extra downstairs bedroom. But those ancient mattresses have now achieved a brick-like consistency. Since my brother and his wife be guesting for a week, it's best to replace the beds — before sleep deprivation sets in and the hallucinations start.

Lower Trundle mattresses - 6 inches Thick Twin

The lower section of a trundle bed slides under the upper. There's typically only space for a 6 to 7 inch thick mattress. Quite often the mattress support is a piece of plywood. So unless the sleeping system is a well engineered, compact combination of cushy and firm your guest could feel like they're sleeping in a lumber yard.

MEMORY FOAMSleep Master Ultima® Comfort Memory Foam 6 Inch Mattress. Rated 4.5 stars with 3,120 reviews. More than 70% of those who purchased and rated this bed gave it a 5 star rating. Priced around $110. Click the link above for the latest Amazon Sales price. 

SPRINGSSignature Sleep Essential 6-Inch Twin Mattress, White. Rated 4.2  out of five. 59% of the 1,484 people who reviewed it gave it the highest possible score. Priced less than $120 the last time I checked. Click the link above to find out if its on sale today. 

Upper Trundle Mattresses - 8 inches thick twin

An 8 inch thick mattress is a good choice for a guest bedroom wheeled trundle bed setup. The mattress is thick enough to provide plenty of cushion and support. Fitted sheets are easy to find. And if someone wants to use the bed as a couch or a chair when it is not being occupied by guests it's easy for a sitting person to get out of. 

MEMORY FOAM - The Sleep Master Ultima® Comfort Memory Foam 8 Inch Mattress is a very good value for the money. For less than $150 you get a mattress that's been reviewed by 3,118 people and has a 4.5 out of 5 rating. 

This bed has 2 inches of memory foam, 2 more inches of slightly denser "comfort foam" and 4 inches of high density base foam. The combination provides a medium firm sleeping experience. That, combined with the very affordable price point makes this mattress an ideal solution for the top half of a trundle bed. 

SPRINGS & COILS - This Signature Sleep Contour 8 Inch Twin Mattress is the number #1 seller on Amazon. It has a rating of 4.5 out of 5 and over five thousand people have purchased and commented on it. Considering that most people who comment on reviews are only there to complain, that's an insane number of people that like this bed! And the under $150 price tag is pretty special too. 

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