A no-frills, highly-absorbent cotton terry robe that shows up in tons of gyms, spas, and guest baths.
This is the workhorse terry robe: 100% cotton, very absorbent, and cheap enough to buy a pair. It's not luxurious, the cotton is a bit stiff until washed, and it can shrink slightly, but for a spa, pool, or guest-room robe that gets heavy use, the value is hard to beat. Buy it for function, not indulgence.