The question is whether you want a full sized body-type towel to dry off after a swim or one used to wash up at night before heading to bed. I would recommend the MSR Ultralight XL towel for full body coverage after swimming and the MSR Nano for washing up at night (face and hands). The Ultralite absorbs an incredible amount of moisture, dries super fast, and packs down amazingly small (about the size of a grapefruit). The MSR Nano is great in that it's soft and easy on the skin, absorbs an insane amount of liquid, dries fast, and is the smallest towel MSR makes (about the size of an package of gum). Both towels will serve you well. These are my recommendations. MSR Nano (https://www.backcountry.com/store/CAS0568/MSR-Packtowl-Nano-Lite.html); MSR Ultralite (http://www.backcountry.com/store/CAS0282/MSR-Packtowl-UltraLite.html)