The thermal backpack doesn't isolate the temperature as good as a common polystyrene box, but it's still quite useful. Unfortunately, the purchase protection period was drastically shortened after the delivery, so, I'm not able to leave here a more complete feedback. Shipped from the store two days after my payment. If you need to keep things cool inside the backpack, choose the light gray one, otherwise, go for the black one to keep things warm.

produit conforme à la description. objet reçu avant la date estimée. Le sac paraît de bonne qualité

gracias vendedor y transportista ha llegado antes de plazo muy contento por la mochila nevera.el probado con 1 bolsa de hielo duro 11 horas mantiene fresco todo 11 horas. comprobado máximo de frío lo recomiendo esta muy bien gracias saludos 🙂👍🤗