Chainsen Ultra

These types of pull-on traction spikes provide lots of extra traction on snow-packed hiking trails, are great for many different types of outings, and will fit on many different types of outdoor footwear. This particular model version of the Chainsen series has the addition of 2 mini horizontal points in front of the toe that can provide extra purchase up front when kicking steps uphill in the snow.  They go off and on in mere seconds, as the burly elastomer harness simply stretches up and over the toe and heel of your footwear and your are ready to roll.  A must have for any 4-season hiker.  While people use these for a variety of outdoor activities and adventures, traction spikes of this nature are not appropriate for technical climbing and mountaineering, so please refer to our crampon page https://featheredfriends.com/collections/crampons or call our Seattle Mountaineering Store @ 206-292-2210 for help with choosing the appropriate system for you. Sizing for Lightweight Boots:      Medium fits U.S. sizes 4.5 - 7.5 (EU sizes 36 - 40)      Large fits U.S. sizes 7.5 - 10.5 (EU sizes 40 - 44)      X-Large fits U.S. sizes 10.5 - 13.5 (EU sizes 44 - 48) Sizing for Insulated Boots:      Medium fits U.S. sizes 3.5 - 6.5 (EU sizes 35 - 39)      Large fits U.S. sizes 6.5 - 10 (EU sizes 39 - 43)      X-Large fits U.S. sizes 10 - 13 (EU sizes 43 - 47)