Smartwool Will Recycle Your Old Nasty Socks, Even if They Didn’t Make ThemGive us your socks, says Smartwool. Smartwool is turning your old socks into dog beds. Which makes sense, because dogs love eating socks almost as much as they love eating bacon. Starting on April 21, and lasting through May 2, select retailers will have bins for you to toss your old socks into. But starting April 21, you can download a shipping label from Smartwool and mail the socks back, and this will be a permanent option.