The Sassy Caddy shoe bags are nylon lined and have mesh sides for breathability. An internal pocket is nice to store extra pair of socks or spikes.
WARNING: This product can expose you to chemicals including Di(2-ethylhexyl) phthalate (DEHP), which is know to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov