KLEINERT'S Men's Sweat Proof V-Neck Undershirt with Dry Defense Underarm Protection 100% Cotton Machine Wash With Non-Detergent Soap. Air Dry For Optimal Use. Comfort-Blended Lightweight Interlock Cotton Ring Spun Patented to Help Prevent Sweat Wet-Thru Top Quality-Hand Sewn with lined in Underarm Shields with Protective Barrier to Absorb Sweat with 6 x 9 Enlarged Shields for Extra Protection. Super Absorbant Underarm Protective Shields with "Three Layers Including Duralite Barrier". Reinforced Collar with Spandex Thermoregulated for Enhanced Activiety