This is a quick fix with no sewing required and uses a pair of babylegs / leg warmers. Yep, it's that easy. Unbuckle your adjustable carrier strap and slide a legwarmer up the strap to the shoulder area. Mine are doubled up to add another layer of protection, also because they are long and doubling them up made them fit a little snugger.
I got these leg warmers from BmodDesigns. There are tonnes of colour options available there and they are pretty thick and of good quality. I've even seen some tutorials on how to DIY lately (like this one for example) using a pair of knee socks. If you're feeling crafty.
I loved how simple this fix was. I hope you do too!