Therapist's Choice Neoprene Thumb Stabilizer, Universal Size. Fit's either hand. Material: Neoprene, Polyamide, Spandex, Aluminum Stay, Metal Spring Caution: Some individuals may be sensitive to neoprene or neoprene blend rubber. If a rash develops, discontinue use and consult a physician. Always consult a medical professional for advice about treatment of injuries or irritation. If discomfort or pain results, persists or increases, discontinue use and consult a physician. Care Instructions: Hand wash with warm water and mild soap. Rinse well and air dry. Do not tumble dry, dry clean, machine wash, or use bleach or fabric softeners.