Tek Gear Men’s Wiking Dry Tek Blue/Green Polyester Stretchable Shirt NWT #84 Size S- Armpit to armpit=19.5″ Sleeve length= 8.5″ Overall length= 28″ Size M- Armpit to armpit= 20.75″ Sleeve length=8.5″ Overall length= 28.5″ Size L- Armpit to armpit= 22.5″ Sleeve length=8.75″ Overall length= 29″ Size XL- Armpit to armpit= 24″ Sleeve length=9″ Overall length= 29.75″ Size XXL- Armpit to armpit=25.5″ Sleeve length=9.25″ Overall length= 30.5″ Wicking fabrics are modern technical fabrics which draw moisture away from the body. … Wicking polyester has a special cross-section and a large surface area, which picks up moisture and carries it away from your body, spreading it out, to evaporate easily on the outside of the fabric. So you stay cool and dry.