Sweet Layette Healthy Mouth Face Anti-dust Organic Cotton Respirator Mask for 0~4 Years Size - Small ; 5.3" x 3.7" (0~18 Months), Medium ; 6.2" x 4.5" (18~48 Months) Tightly woven mask helps protect from inhaled contaminants Effective - Excellent filtration of dust, pollen, mold spores, pet hair & dander, various bacterial allergens, and airborne effluents that can contain cold and flu germs Washable Reusable Mask: Protection from Dust, Pollen, Allergy, Flu The lining material organic cotton uses in our masks contain an antimicrobial agent that kills germs and lasts for the life of the mask. It is hospital safe, non-leaching, and non-allergenic. GOTS Certified Organic Cotton, No Dyes. Baby dust Mask.