Staying dry is the most critical and challenging part of biking in the rain and snow as spring arrives. The best way to keep warm and dry is to wear waterproof clothing. While most synthetic fabrics still insulate when wet, being damp diminishes their ability to keep you warm. Therefore, a waterproof jacket and pants are a great way to start, but waterproof socks and gloves complete the outfit. While many materials are naturally waterproof, once perforated with stitching, zipped closed with generic zippers, and left to be loose at all the cuffs, their waterproofing goes out the window. Before you go out and buy anything labeled “waterproof,” read on to understand that all waterproofing is not the same.