Canadian Shield Insect Repellent is an essential product for anyone planning to spend time in Canada's great outdoors. This highly effective insect repellent provides up to 8 hours of protection against a wide range of biting insects including mosquitoes, ticks, black flies, deer flies, biting midges, and chiggers. It is formulated with 30% Deet, which is widely considered to be the most effective insect repellent available and has been used by outdoor enthusiasts for decades. Non-greasy, won't stain.