strong plastic, so won\'t easily tear. ,re-sealable bags for freshness. ,convenient for when you\'re on the move,28 daily pouches per pack these re-sealable bags are ideal for when you are on the move, whether it\'s to take to the office or on an overnight trip.they typically hold a day\'s supply of supplements and being re-sealable, you can be sure that the small quantities of tablets, capsules, (or even powder), will not be exposed to the air. they fit nicely into pockets or handbags saving you the hassle of packing several different pots of supplements. it is also more likely to ensure compliance! each bag measures approximately 10 x 8cm. each pack contains 28 daily pouches.