Odours stop here!! Reusable and recyclable! Food or toiletries are undetected even when left on the ground. Designed for hazardous materials and biological waste, these bags have been proven even in bear country to be odour proof! Works for possums, dingoes, and bush rats, too. They are humidity proof, vapour proof and certified 100% leakproof to 200 feet/ 60 meters under water. The special durable non permeable film is heat tolerant to 165F/74C. Prevents freezer burn. Pour boiling water into the bag to rehydrate foods!. FDA approved material with a patented airtight seal!!