The Coghlan's Bug Jacket is the ultimate protection against mosquitoes, wood ticks, deer ticks and no-see-ums. Features a fine No-See-Um Mesh made from 100% Polyester. Flame retardant, lightweight and keeps you cool. Elasticized drawstring waist and cuffs. Zippered at the neck for easy access to the face. Jacket is unisex and sizes are measured by weight.