Some garments may provide some protection. However, the fabric of most of this clothing is thinner with the intention of keeping you cool, so it will not offer the most effective barrier against bugs. For protection against mosquitos which can carry malaria and other diseases in certain developing countries, it is always best to carry specialist mosquito or bug spray. These sprays are specially formulated with chemicals which will keep these mosquitos away from you. If you do get bitten by a mosquito, it is always wise to seek medical attention.