Montane mens dyno stretch jacket the dyno stretch jacket is designed to be worn on long summer days in the mountains wear it on mountain routes either alone over a baselayer or as part of a layering system during more hostile weather chameleon kinetic fabric wicks hard dries fast and features a four way stretch so no matter how physical the movement the dyno stretch jacket will work with you fully featured technically tailored and durably constructed the dyno stretch will give you yea