We have a great range of Arena boys jammers available to shop online! The Arena Water Instinct range of Arena swimwear offers a line of Arena junior jammers for boys. Arena junior jammers are available in the Arena training swimwear and Arena racing swimwear ranges. The Arena Powerskin ST 2.0 Jammer junior range is a particularly popular option from the Arena boys jammer line. Swimmer is an official Arena Australia stockist.