being a guy that likes his critters with teeth, I use drift socks for a few purposes & I carry multiple size pairs of socks 15", 20" & 40" ers (the 40's were 1st time venturing into sock usage & used a man's mentality that bigger has to be better! Not so in drift socks, match them to your purpose & rig size. I mostly use them for trolling speed control (aka..poor man's kicker motor). With the pair of 40's deployed my Opti has a hard time even moving the boat unless running a lot (TON!) of throttle & scaring any fish within an acre away out of the area. And if only one is deployed & it's not dead center behind the boat, even at full steer lock, the boat is difficult at best to keep on a straight line course unless the throttle is cranked up quite a bit (again, see clearing out all fish within an acre of boat) The 15's were a 2nd attempt at getting it right & those are a tad too small but work well when trolling cranks at a slightly higher speed (about 2-2.5 MPH). The 20's are perfect for trolling crawler harnesses for eyes (.7-1.5 MPH), slow drifting for stump carp in a river, slow drifting open water drop offs, etc. As far as the socks themselves, I'm partial to the Cabella's Pro Sock. Thin, light weight, fast drying nylon material, easily deployed/retrieved, dump line for pulling effortly, bottom weight/top flotation for dependable-self deploying. I do use the Cabella's 7 foot harness bouy straps for attaching them to the boat. If we get a bite & the critter wants to come in at the same area that the sock is following, they are easy to unhook from the boat, land the fish, & go retrieve the sock when ready.
I wouldn't be without my socks!
My .02... (my rig is a Tracker Targa 17 deep V with a 115 Opti)
Maj