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I have a BakFlip VP for 14 months, so far its held up well, snow ice etc. My truck is always outside too. Easy install, shipped to house .
Xtang trifecta, eliminates the worry of snow and ice and whatnot getting into your snaps or Velcro rendering them useless. By far the easiest cover to open and easiest to install/remove. Make sure in the summer you condition the leather every once in a great while to avoid cracks at the folding points and you're good to go.