Sleeve grippers — those silicone or elastic bands inside the sleeve hem — aren't essential for every rider. Jerseys without them are perfectly fine, especially for casual rides, commuting, or relaxed-fit jerseys where comfort matters more than aerodynamics. Many riders actually prefer the feel of a plain hem because it doesn't squeeze or constrict the arm.
The main trade-off is that sleeves without grippers may slowly ride up as you move, which can be mildly annoying on longer rides. If you're not chasing aero gains or don't mind occasionally tugging your sleeves back down, it's no big deal. Riders with larger arms sometimes find grippers uncomfortably tight, so a plain hem can be the more comfortable choice.
Sleeve grippers matter most on race-fit or aero jerseys, where keeping the sleeve in a specific position reduces drag. For everyday riding, skip them if you prefer a freer feel.