altra women's lone peak 4.0 (10 b(m) us), grey altra there's no such thing as bad weather, just bad gear, right?! well with the brand new altra lone peak 4 rsm you'll have no excuse. made for rain, snow, and mud (rsm), this shoe is ready to tackle the elements. as part of the altra all-weather series (aws) the event upper is 100% waterproof and offers market leading breathability, delivering maximum comfort and protection in the widest range of conditions. in addition, it has a reinforced toe cap, refreshed mountain design and 4-point gaitertrap. and the updated duratread outsole with multi-directional lugs and prominent trailclaw offer enhanced traction on gnarly terrain.