I believe the honeycomb is now standard on the newest iteration of the liners. So I would assume that if you get the Sidewinder option it will be covered in the honeycomb material. The liners I checked out at my local shop all had the honeycomb and the one pair of liners with the Sidewinder option had this covering too. Either way, just be clear when ordering that you want the Sidewinder with the honeycomb.
That all said, I have never skied the Sidewinder option, but while checking it out in the shop I noted that the "break in" looks to be more challenging if there is a hard plastic sheet down the inside edge side of the liner. I have to question how much value there is in the Sidewinder option, but I'll hold out final judgement until there is some feedback from real world experience.
Well, I had Steve at Snowbird fit me with the Gara Sidewinder on Monday. He also tweaked my footbed on Tuesday so that I had more weight on the heel and less on the balls of my feet. He diagnosed that as as major problem that was causing me to get thrown in the backseat
I'm in a 28.5 Head Raptor B3 RD. Super, super close fit and the shell required extensive modifications in order for the Zipfit to work well.
Monday - absolutely excruciating. Felt like my foot was in a vice. The pain was so unbearable that I considered throwing my stock liners back in. I skied in them for the rest of the day and the pressure was so bad that my toes went numb for more than 24 hours.
Tuesday - went in first thing in the AM and had Steve work on them. Lots of grinding and afterwards, my feet and ankles were feeling better. Also, the nasty heel spurs were starting to calm down. Started to see some small improvements in control.
Wednesday - started the day on the slopes with no new modifications. Foot feeling MUCH better. No longer getting crushed. Heel hold is vice but comfortable. Started getting a feel for the side winder. Wow!!! MUCH, MUCH, MUCH more precision and control when carving. I was really able to get on my edge and carve sharp, deep RR tracks, which is something I've had a hard time doing. These liners are absolute game changers! I can really stand on my ski with absolute control and precision. That side winder is incredible and just allows me to rail! Precision in the pow,crud, steels, trees and mogul fields is better than anything I've ever experienced. Finished the day off with a small amount of grinding on my navicular.
Brought my 14yo son in with me to get fitted for a Zipfit Grand Prix Side Winder. He'll probably be miserable tomorrow but by Friday I expect the light bulb will turn on for him.
Hope my experience helps.
Bill