Anatomica zone merino boxersthe icebreaker anatomica zone merino boxers have been built for increased breathability and comfort during high octane activities.the stretch and breathability is provided by icebreaker's cool litetrade fabric, which combines high performance merino wool fibre to keep you cooler in the warmest and most humid conditions'. '.strtoupper('f')or added durability and strength, nylon threads have also been woven into the merino wool, resulting in a prolonged lifespan without compromising on next to skin softness'. '.strtoupper('i')n addition, the natural bacterial and odour resistant properties allow for prolonged wear and maximum freshness, while flatlock seams provide chafe free comfort no matter what the activity.featurescool litetrade fabric for faster wickingcorespun for enhanced durabilitylycrareg content adds stretch and mobilitystrategically placed merino eyeletflatlock seams prevent chafingcontoured pouch50% merino wool, 33% lyocell, 12% nylon, 5% elastanewash 30 max, do not tumble drybuy icebreaker from chain reaction cycles, the world's largest online bike store.