The MKII Slip-ons are a simple, strapless design, consisting of an Armourgelpadded kneecup attached to an elasticated, neoprene-like sleeve. Amplify sell an alternative version with twin Velcro straps if you want a bit more security (also 90$).
The flat sections of Armourgel give the MKIIs a nice low profile, so they sit well under shorts and don’t feel bulky on longer rides. But the lack of shaping means the padding sits close to your kneecaps and can chafe if you’re doing lots of pushing or on really sweaty rides.
There’s decent coverage around the knee and enough padding to take the sting out of trail spills. Despite the lack of straps, the Slip-Ons are surprisingly stable – they stayed in place throughout testing and didn’t need to be pulled up even after long descents, thanks in part to the silicone gripper inside the upper and lower openings.
Price 90$