Made from quality strong 38 micron polypropylene. Thickness / Strength of the plastic is approx 38mu / 38 micron. Safety Warning Notice in 5 Languages. Breathable Bags with Punched Air Holes, bags with suffocation warning labels printed in 5 languages. Suffocation warning is written in English, German, French, Italian & Dutch. The warning is printed on the back side and states "WARNING: To avoid danger of suffocation keep this wrapper away from babies and children” 100% DEGRADABLE Bags are clear / transparent, with a self sealing peel and seal adhesive strip. Just pack your contents, peel and then seal, done! Size of bag stated in product title is inches and millimetres, and reads WIDTH (opening end) of bag x HEIGHT of bag. The height of bag DOES NOT include the self seal lip, which is approx 40-50mm, in addition to the stated height of the bag. Ideal for business and private use, to protect garments / clothing, or using as storage bags as part of your mailing, to your customers, family or friends, in a safe and secure way. There is a punch hole which release air pressure while putting any stuff inside the bag