Share . Letting go . Slumber Grab is made for sharing. Both as a sofa and unfolded as a twin-size bed. Grab's armrests are designed so that they can be easily detached to act as rear legs for the twin-size bed with just one turn. This is the easiest conversion from sofa to bed yet. Grab comes with a comfortable futon mattress. Design by Says Who for Karup Design. Please note that all our futon products are handmade, so there may be slight variations in dimensions and weight.