After long lunchtime runs I would love to be able to ice my legs without getting my work clothes wet.
I remember there were some products that claimed to serve this need.
That’s gonna be tough, since even enclosed ice packs will still generate condensation. Two options are to go with compression socks instead of ice, or to use thick cotton tube socks and stick those gel ice packs in them (the cotton will absorb the condensation and keep your pants dry).