Dry ski slope produced in a darker green (such as in Kendal Ski Club in Cumbria, England) to comply with planning requirements. There is no indication from NorCal Extreme Sports that AstroRide has been commercially tested to any great extent. The latest arrival is from UK company Proslope who produce a matting with variable filament lengths to emulate the gradual edge grip and release of snow. As with some other surfaces, the system is coloured white, is modular, and works both with and without a misting system. Dry slope users often improve the performance of their equipment by using the hardest grade of
Ski pole cave painting, dated at 4000 BC. Early skiers would use this pole for the purposes of balancing, braking, and turning. Alpine societies such as those in Nordic regions or the Altai mountains used their ski poles to hunt as well, giving them spear-like qualities. Skiers began to use two ski poles in 1741. This provided greater balance than one pole could provide and made pushing through the snow easier. Early ski poles were made of pine and bamboo, materials which today are used for novelty poles. US patents for steel ski poles began in 1933 when John B. Dickson invented