from label:

98% cotton, 2% stretch fibre

Machine Washable: gentle cycle, mild detergent, No bleach, no liquid fabric softener containing Cationic agents.

Machine Dryable: at lowest temperature setting, or air fluff dry. NOTE: always machine dry after machine washing -- OR--

Hand Wash: in tepid water with mile detergent. Rinse in tepid clean water. Roll in towel to remove excess water. Lay flat to dry, away from direct sunlight.