These are 8-point snow spikes with grip in both the vertical and horizontal directions. This is a simple model that attaches to boots with rubber bands. It's lightweight and compact, making it convenient to carry. Includes a stuff sack. Set of one pair (left and right). Optimal Uses: Winter low mountains and summer snowfield walking Specifications: Material: (Body) S55C carbon steel [2mm thick] (Band) Elastomer Weight: 190g [230g] (pair) *The values in brackets [ ] include the total weight with the stuff sack. Color: Black (BK) Compatible Shoe Sizes: Free size (21.5cm - 30.0cm) However, the width of the instep of the shoe must be within 78mm. Storage Size: 12 x 10 x 6cm I purchased these but never had a chance to use them, so I've been storing them. Montbell mont-bell Mountaineering Snow mountain Snow trekking