The construction of park skis
Park skis are actually also called twintip skis because both the tips and tails have upwards curves. The curved-up tips and tails prevent resistance and make it easier to do tricks in the parks and on the slopes. Furthermore, it is possible to make backward landings with a pair of twintip skis, just as you are able to ski backward. That is why you might also call them freestyle skis at times. The twin tip design has more or less become the standard design of most park skis because it’s a great design for the slightly deeper snow.
Freestyle skis often have a soft flex – both on the long side of the ski and torsional – making them resilient and flexible. Generally, this type of ski also has a wide tip, tail and middle/waist, and the construction consists of soft materials for better shock absorption. Twintip skis usually have a rockered tip and tail combined with a camber or flat middle.
Freestyle skis are trick skis
Some may refer to them as trick skis, but they are more frequently known as freestyle skis because they are suited for different freestyle disciplines, just as snowboards. Different freestyle disciplines have been part of the skiing scene for many years, but in the 1990s some skiers started to do tricks in parks made for snowboarding. The skiers needed a new type of skis for the new discipline, and soon several manufacturers started to produce skis with twin tip design.