A compact and efficient solution for loose bed sheets. It consists of two components that clip together to hold sheets together without damaging them. Slide the frame underneath the mattress, and then clip the sheet on with the bolt. The two components do not clip together without a sheet; this is deliberate to ensure that they still fit together when there is a sheet. 
 

Recommended print parameters are:

PETG, minimum 30% Infil and snug supports on the bolts.
 

The inspiration for this model was a similar design by Levanter, linked below:
[https://makerworld.com/en/models/1542248-compact-mattress-sheets-holder#profileId-1618802](https://makerworld.com/en/models/1542248-compact-mattress-sheets-holder#profileId-1618802)

Check @Levanter for awesome models, like these.