I'm not easily sold on much, but found this online to help keep my Pro RMK cooler when riding on hardpack, ice, or sometimes dirt to get up to the high country powder in the Cascades. Holds enough snow and hardpack over the tunnel to keep the sled cooler. Thought I'd share if you want to continue to ride this year. Cheers!
iceboxxpro.com
iceboxxpro.com