Rio Extreme tippet is a Dyneema material which has a specific gravity of 0.97.(floats) Suffix Performance Braid is the same material.. and costs about $15 for 150 yds.
I am not a furler,but I would say you could obtain the same results by using Sufix.
I have been tying tapered leaders out of Sufix for about 10 yr and have found them to be the best leader for dry ..dry/dropper.
I treat the leader with a mixture of Sno seal and albolene cream.