Description and useOtifleks Goodsleep Sleeping Earplugs are at the cutting edge of sleep earplug design. An earplug for sleeping demands a small profile whilst providing maximum comfort and sound blocking ability. Traditional silicone/wax sleeping earplugs gather lint and other impurities whilst sleeping. Foam earplugs employ a one size fits all policy: either too small for effectiveness or too large and incredibly uncomfortable. Otifleks Goodsleep Sleeping Earplugs are made from thermo-reactive elastomer: a soft flexible material that matches your body temperature within 4 minutes conforming to the unique bends turns bumps and twists of each individual’s ear. Virtually invisible reusable and washable.WarningsDO NOT push into the ear canal cover the entrance only. Use for continuous periods lasting no longer than eight (8) hours per twenty four (24) hour period. Keep out of reach of children. Parent or guardian's supervision is advised. Do not store in direct sunlight or within proximity of heat sources.