No power, small size, convenient to carry, good insulation effect.

The liner is made of high-quality tin foil, designed with velcro, not only has good insulation effect but also can be easily organized.

Multi-layer design, there are thermal insulation course, storage layer, buffer layer, better to maintain the temperature and place drug.

Good to Know:The Ice Packs need to be placed in the freezer for 10-12 hours before you use it.

Dimensions: 7.87*3.54*1.57 inches (L*W*H); Weight: 6.4 ounces; With 30 days money back, 1 year warranty and easy-to-reach customer service.