Extra-Roll Mat Holder
 

 
 This is a very simple option for securing a "roll mat (closed-cell mat)" using one 2mm shock cord (130cm), one cord locker, and one double hook. It is limited to lightweight cylindrical items like roll mats, but it holds them more securely than it looks.
 

 
 Base price: 350 JPY (Tax included: 385 JPY)
 
 Weight: 4g