With UA Vanish to keep you dry and distraction-free, Under Armour added a soft lining that traps warmth in for those cold weather days and stretches with every move. It&';s got everything you need to hit training hard. Ultra-warm, textured knit fabric with added stretch for comfort that moves with you Dual-layer fabric on side body & lower sleeves helps keeps you warm with a soft brushed interior & smooth exterior Material wicks sweat & dries really fast 4-way stretch material moves better in every direction Generous A 1/2 zip front makes for easy layering Built-in thumbholes help keep sleeves in place Reflective branding & tape details for greater low-light visibility Odor control technology minimizes odor