+1 on rolling up pants, underwear, tshirt & casual wrinkle free dress shirt placed in sealed Hefty Jumbo 2.5 gallon bag inside a Jannd Economy Pannier along with lunch. Other side Jannd Pannier has pump & tube, rain cape & booties, lights, jacket, warmer gloves, etc.... Shoes & a spare pair of socks kept at work. (In winter like to have a spare change of clothes, toothbrush, razor, soap & towel in event that weather forces a stay at work or nearby hotel.)