Coolerest Sleep Pad Original Single/Twin Size Cotton Single size coolerest sleep pad; measures 35.5 inch w x 35.5 inch d x .5 inch h Blue 100 percent cotton cover; No limit of how many times the coolerest sleep pad can be used; stays cool for up to 60 minutes depending on your body temperature and room temperature Hand Wash Only - Air Dry; Non-toxic. Constructed of gel and cotton