I even tried the toe bumper with them and it still didnt work. Pude comprar perfectamente la talla M4, mucho más económica en ese momento, pero suelen quedar muy ajustados del empeine, así que decidí, la M5 y me quedan flojos de las correas o tiras. Im 52 and theyre far to old looking. The removable insole is great to help cleaning. These shelves were quick and easy to assemble and look great! Nice novelty item. This is sold by Amazon and I find the title misleading "HulkFit Multi-Function Adjustable Power cage with J-Hooks, Dip Bars and Optional Lat Pull-Down Attachment, 1000-Pound Capacity " I say that because it reads like the Optional Lat Pull-Down Attachment is included throughout the page. Much sturdier than I anticipated, stylish and looks like it will be around for a long time. For me it’s super easy because we had an electric outlet switched to a USB & electric outlet. When I want to use them I have to go and delete the previous pairing, pair them again and then go to the control panel and set these to be used for output.