Simple to use——You only need to tie the purchased snowshoes to your shoes through the nylon quick binding system, and you can start using it without additional installation steps. Humanized design——ergonomically streamlined design and slightly upturned round tail plus solid jagged crampons will bring you higher stability when walking on snow, enabling fast movement and easy walking High-quality materials——Aluminum alloy frame with high-density PE inner and outer wrapping, nylon rope straps, realize light and cold resistance, stable and durable, for the long-term use, we must make you rest assured in the selection of materials. A variety of sizes are available——-21/25/28/30 inches four sizes, considering the shoe size of different groups of people, regardless of man, woman and teenagers can use. Instructions for use——because the length of time the snow is on the ground and the weight of the human body will directly affect the stability when using snowshoes, you can refer to our recommended size for purchase. (21in: 70- 120 lbs. 25in: 120-160 lbs. 28in: 160-190 lbs. 30in: 190-220 lbs.）