These are simple slip-on spikes that attach securely to your footwear and require no special buckles or straps to attach (not to be confused with crampons).
If you are doing the Gokyo and Everest Trek or the Three Passes treks, micro-spikes are recommended for crossing the passes. Although highly unlikely during the peak trekking months, there is ALWAYS a possibility of snow and ice on any of the treks in Nepal. Most likely these will not be used but picking up a pair of these will help you prepare for the worst. These are simple slip-on spikes that attach securely to your footwear and require no special buckles or straps to attach (not to be confused with crampons).