When the environment is difficult to walk through due to mud, ice or snow, our Magic SpikerTM Mud & Ice Grippers are an ideal solution, easy to use for young and old. They are worn by everyday people, as well as government and professional services personnel.and of course hiking, orienteering, geocaching and snowsport enthusiasts.Magic SpikerTM Mud & Ice Grippers are the original and most effective value grippers available. As the UK patent holder, UK trademark holder and official distributor we have been selling them successfully for 8 years across Europe. Offering a no quibble 12 month warranty you can expect a simple, great value product. We use only the highest quality components which allows you to use them in extremes of hot and cold temperatures and trust that our crasmpons wont let you down.They are quality manufactured to ensure longevity and are easy to put on and take off (check out the "How to put on your Magic Spikers" demo on youtube).As we are launching on Amazon USA here is some Amazon Europe Feedback:Really effective.....Excellent really does what they are intended for.....facile à positionner sur les chaussures - Quasiment invisible sur une chaussure noire - A recommander.....Good in mud as well as ice.....Very sturdy and work well in snow. Have ordered Yaktrak previously, but these are better.....Livraison impeccable, produit excellent.....*Sizes will vary dependent on the shoe/boot style and manufacture. Always walk cautiously in unfirm terrain and difficult weather.