Good cycling shorts or bibs. This is not the place to save money. Many different brands offer good shorts just make sure you go with one of their higher end products. I know $115 or so sounds like a lot of cash but I have had one pair of Pearl Isumi shorts since 1995 and during that time I have probablly thrown away 3 cheaper pairs of shorts. Now is a good time of year to buy, here is a pair on sale:

For her:

http://www.performancebike.com/shop/...tegory_ID=1220

For him:

http://www.performancebike.com/shop/...tegory_ID=1120