Ergonomics & Palm Cushion Technology
Analyzing the foam compound, contact pressure distribution, acoustic dampening, and hand-size ergonomics.
Will the M850 L Fit Your Hand?
Enter your hand length (wrist crease to tip of middle finger) and select your natural grip style.
Perfect match! Your palm heel will rest fully on the dual-foam cushion with natural thumb alignment.
The Palm Cushion: Anatomy & Build
Wipeable Non-Porous Surface
The outer surface is a soft-touch polyurethane elastomer that resists body heat and skin perspiration while remaining smooth under friction. It does not gather lint like cloth mousepads.
High-Density Sub-Layer
Underneath the outer skin lies a resilient molded foam core designed to cushion the thenar/hypothenar eminence (heel of the palm) without collapsing or bottoming out under heavy hand weight.
Cleaning & Maintenance Rules
Logitech instructs cleaning with a damp microfiber cloth and mild soap. Disinfecting wipes with <25% alcohol are permitted; undiluted isopropyl alcohol or acetone will dissolve adhesive and degrade the foam.
Sensor, Switches & Teardown Analysis
| Component | Specification | Real-World Performance & Experience |
|---|---|---|
| Primary Switches | Logitech SilentTouch microswitches | Dampens acoustic click noise by >90% (<30 dBA). Distinct tactile feedback without mushiness. |
| Optical Sensor | Advanced Optical Tracking (400–4,000 DPI) | Adjustable in 50 DPI increments via Logi Options+. Perfect on mousepads/wood; does not track on glass. |
| Scroll Wheel | Kinetic SmartWheel with auto-shift clutch | Line-by-line ratcheting for spreadsheets; auto-shifts to frictionless kinetic free-spin on fast flicks. |
| Glides / Skates | Standard PTFE pads (Black) | Adequate glide for desk work; slightly higher friction on coarse cloth desk mats compared to virgin PTFE. |
| Internal Chassis | Modular PCB with Torx/cross screws | Concealed screws under skates; thumb switches socketed directly to side daughterboard. |