Contrary to the prevailing wisdom in this thread, after three Caminos, I found MY idea towel solution. I have used it on my last two Caminos with success.
I use a standard sized microfleece, but terry cloth tufted, YOGA towel. Mine is made by Gaiam. It is a standard (large) towel intended to be used with a padded yoga mat. It does NOT have grippy dots on it.
Over the years, I have tried virtually every fabric and every size of travel, hiking or camping towel offered. They have all since been donated "down stream." Here is why I chose the yoga towel over other towel solutions. BTW, my towel is bright orange with pink piping on the edges...
The yoga towel is:
- Large enough to wrap around my prodigious lower body in a semi-public shower situation. I am shaped like a beer keg with funny legs and have a 105 cm waist...nuff said there... But the towel is long enough to wrap and tuck...
- Large enough that after I dry off from my shower and dress in fresh clothes, I can "roll and stomp' my just hand-washed clothes (shirt, boxer shorts, and two pair of socks). This gets 95 % of the water out of the clothing so they dry very fast.
- Large enough when rolled to serve as a pillow, or prop for my feet if I need to elevate them. I am not fond of albergue pillows.
- Large enough to use as a throw / cover while I am sleeping on a chilly night. This comes with the added benefit of drying from the heat my sleeping body gives off.
- Conversely, on a very hot night, the still damp towel laid over my hot body will cause an evaporative effect, helping to cool me down, while also drying the towel.
- During the day, the orange towel can be folded and hung on the outside of my rucksack as a bright signal panel to alert motorists or cyclists approaching from behind me. It also dries further when carried on the outside of my rucksack.
- In an emergency, the orange towel can be used as a marking or signaling device to get attention or to mark one's position.
- In a cold weather emergency, the towel can be used as a shawl, blanket, or scarf, as needed...
My standing rule-of-thumb is that anything I carry on Camino MUST have at least two distinct and reasonable uses. The larger yoga towel more than qualifies.
The SOLE 'con' IMHO to using this towel is the dry weight. The towel weighs 259 grams (9.1 ounces). The volume does not worry me as the towel can be carried anywhere in or one the rucksack. I can justify carrying it because of the many and varied uses. But the weight might be an issue for some.
Your qualifications and experience may vary.
I hope this helps.