The zippers are sturdy, with no problems in the two years we have used them. It is terribly heavy for backpacking and definitely not rated correctly. If you just can’t afford a better bag…DO NOT GO OUT IN COLD WEATHER OR YOU WILL REGRET IT. The only ozark trail chair way you would sleep well… Continue reading Ozark Trail FXWM17004 10F Synthetic Mummy Sleeping Bag