they have zip vents on the thighs to regulate temperature and a pull cord behind the calves to cinch the cuffs up for easy boot removal

BOA™ 360 Fit System offers the most adjustable fit with the turn of a dial for on-the-fly micro-adjustability

Half side leg zip

For more information on Nikwax BaseWash

chilly evenings at the crag

Arc'teryx Atom Jacket W Shell Pants they have zip vents onLightweight, versatile Coreloft insulated jacket with air permeable side panels for mid level output activities. Functions as an outer layer or midlayer depending on conditions Light, soft Tyono 20 with DWR finish to repel moisture Resilient Coreloft Compact 60 insulation retains loft Performance stretch fleece side panels give ventilation Mid height collar is insulated and fleece lined, layers well No Slip Zip main opening, zippered hand pockets,