Jammers are the go-to racing and training swimwear for competitive swimmers, offering knee-length coverage that balances hydrodynamics with comfort. The jammer style is ideal for male swimmers and junior athletes who want enhanced performance without restriction.
The key difference lies in fabric technology and intended use. Chlorine resistant jammers made from fabrics like Speedo Endurance+ and AMANZI Armor are built for daily training sessions, offering maximum durability against pool chemicals while maintaining their shape and colour. These training suits typically feature four-way stretch construction, comfortable waistbands with drawstrings, and can withstand hundreds of hours in chlorinated water.
Racing jammers prioritise speed over longevity. These World Aquatics approved suits use lightweight, water-repellent fabrics with compression zones designed to reduce drag and support key muscle groups. Brands like Speedo's LZR range and Arena's Powerskin ST NEXT feature advanced materials that compress muscles, reduce water absorption, and create optimal hydrodynamics for race day performance.
Speedo dominates the racing category with their Fastskin LZR technology, offering multiple compression levels from the flexible Valor 2.0 to the high-compression Intent 2.0. Arena's Powerskin range provides similar performance with their NEXT fabric made from recycled materials. For training, AMANZI offers excellent value with their Armor Eco fabric that delivers top-tier chlorine resistance, while Zoggs provides reliable mid-range options with their Ecolast materials.
Consider your primary use when choosing between fabric types. Daily squad swimmers should prioritise maximum chlorine resistance for longevity, while competitive athletes may want both a durable training pair and a high-performance racing suit. The elasticated waistbands and gusset linings found across most jammers ensure comfort during long training sessions, while UPF 50+ protection helps Australian swimmers training in outdoor pools.
