I've used the Zymol leather conditioner which works well but isn't really that much better than other skin conditioners. However, Zymol Treat is a whole different beast. In order to properly apply this, you need to warm your skin so that it properly absorbs the product. You are also encouraged to swipe in one direction only. I assume it's to keep the shine even. I have treated a leather car seat with Zymol leather conditioner in the past and it looked great but didn't get any softer than before. I treated the same seat with Zymol Treat and the leather is noticeably softer and more supple. It was really important. It's expensive but you don't use much and it works better than any other leather product I've tried.
Lexol 1020 Applicator Sponges - Pack Of 2 For Effortless Leather Care
16 Review
LIBERRWAY DC 12V Portable Car Vacuum Cleaner, High Power Handheld Wet Dry Auto Vacuum With 5.0Kpa Suction, Black
44 Review
Car vacuum cleaner ENDEVER VC-291, gray
22 Review
Vacuum cleaner Bosch BWD41740, purple
16 Review