... 21.5*5.5cmwith pvc zip lock bag packingAvailable in various Sizes, Designs and Colors1) Usage: both ... minutes.--Cold usage: Lay the gel pack flat in freezer for at least two hours.--hot compress: alleviate ... conveniently, necessary as a first-aid for every family in daily life2) Material: PVC, EVA, TPU, nylon ... We have1.produced various cosmetic and packaging bags in fabric, PVC,EVA,TPU2.more than 10 years ...