This cover has fulfilled its role during my winter trip in Quebec (-20 ° to -36 ° C) Of course, plastic glass was freezing, but I soon learned that he had to remove the glove from his right hand and only keep the glove in right and tighten the cuff on the wrist. The warmth of the hand is then enough to warm the battery and the casing, even during outings 6 am by -25 ° In these extreme conditions, reading metrics in the viewfinder is impossible shots are on the fly, or LCD that has not frozen (tarp effect?) I take off 1 star because the zip is not separable, we must open the shoulder of the device to pass in the headlines of the sheet and the back strap on the device (complex with the Canon original belt ) The delivery of the product to well below stated time, so this is perfect. I would recommend this product, which even attracted the curiosity of our cousins from Quebec photographers
