Funky Trunks Broken Arrow Training Jammers. The training jammer is perfect for regular training with flatlock stitching, comfortable leg opening, drawcord and rubber print FUNKY TRUNKS logo. It's a popular choice for swimmers and triathletes and offers an extra layer of warmth in open water when a wetsuit isn't an option. Constructed from C-Infinity, the training Jammer is designed for continual use in chlorinated water. C-Infinity is a colourful breakthrough in chlorine resistant fabric technology. The superior choice for swimmers, C-Infinity has exceptional strength and can retain it's durability far beyond other elastane swimwear fabrics. Ideal for frequent pool use for recreational and performance based swimming, all Funky Trunks and Funkita Swimwear is made with C-Infinity.