Unless you’re wearing Mack Weldon’s new AIRTKNITx underwear right now you’re missing out on some important comfort and performance features. Built from the ground up by Mack Weldon to blend the classic underwear look and feel with material and construction that could stand up to a workout, AIRKNITx underwear transitions easily through every aspect of your day. How is this possible? Lightweight fabric with 4-way stretch that moves with you and is insanely breathable with complete mesh cool zone construction. No roll waistband and stay put legs. Anti-odor coating and moisture-wicking for all day freshness. AIRKNITx underwear is built so well that Mack Weldon battle-tested it with Equinox trainers. Whether you’re a really active guy or just hitting the gym regularly, this is the underwear you should be wearing.