while an open cutout in the back allows for cooling breathability and movement

A great find

THERMO MAX + anti odor and moisture management technology Ventilation via mesh fabric at back panel and armhole Soft

The Instinct MP remains a more forgiving option to the Prestige and Radical

Lightweight MzO micro-fiber polyester with LYCRA

New Under Armour Men's Threadborne 3/4 Sleeve XXX-Large Purple XXX-Large:Purple while an open cutout in100% Polyester Imported Machine Wash UA Siro has a unique construction that's super light, dries incredibly fast & wont cling to you Unique pattern gives it a stand out look & stealth ventilation Anti odor technology prevents the growth of odor causing microbes Dropped hem for enhanced coverage sleeve length