For competition swimmers there is an extensive range of jammers in the online shop at shop4swimming.com: Arena Carbon Jammer, Powerskin Jammer from Arena, LZR Fastskin Jammer from Speedo, cheap Jammer from Mad Wave. At international swimming competitions, such as World Championships, European Championships or World Cup, the best swimmers in the world swim with Carbon Jammer from Arena or with LZR Racer from Speedo. The Jammer from Mad Wave or from Diana are particularly inexpensive models.