Short Sleeve FR Two-Tone Base Layer - EXCEL FR has a self-fabric crew neck collar. It is tagless with raglan sleeves. The side seam gusset is contrast mesh. There is a heat seal Bulwark® triangle on the center part of the neck to indicate that the wearer has put on FR undergarment. This flame-resistant, 90% Cotton/10% Polyester fabric should be handwashed. It weighs 5.5 oz and has moisture management finish. The protection arc rating ATPV is 6.4 calories/cm².