One of the most important design decisions we have made with this cooler is how to best strike the balance between thermal performance, weight and durability. The primary driver for the Tempo cooler is thermal performance. This in turn has informed the design decisions made around weight and durability. The cooler walls in the Tub and Lid are made from a 1mm (3/64”) thick aluminum sheet. Whilst the internal insulating core under vacuum provides a very rigid sandwich construction support for the inner and outer shells, dents and scratches can still occur in the shell during normal usage. This is normal and should not affect function. Compared with a thick-walled, rotational-molded and PU foam-filled hard cooler, the Tempo performance cooler is more prone to cosmetic marks. But while dents and scratches can happen, rest assured that the construction is extremely resistant to puncture of the vacuum chamber itself. We have carried out extensive torture testing during our R&D process and while there have been many instances of cosmetic dents and scratches, there have been very few instances of puncture and loss of vacuum.