The Assos MILLE GT Indoor bib short adapts the brand's proven GT S11 platform for trainer sessions, pairing the durable QUARTZ textile through the high-contact zones with breathable POLSTAR mesh across the legs. That same combination that cuts heat indoors holds up just as well outside, so the same pair works a summer century as easily as a winter trainer block. What Our Gearhead(R) Experts Are Saying:"I bought these for my trainer setup in the garage and ended up wearing them on the hottest ride of the summer without a second thought. The leg panels move enough air that I forgot I wasn't wearing a summer-specific short."