The Flexair's back-of-hand material is the primary breathability surface of the glove — the area that faces the airstream during riding and where heat dissipation is most effective. FOX specifies lightweight material for this surface with the explicit goal of exceptional breathability, and the construction reflects that priority: the back-of-hand panel is thin, open, and unobstructed by padding, reinforcement, or structural elements that would impede airflow. For mountain bike riding — where effort levels vary significantly between climbs, descents, and technical sections — a glove that manages hand temperature effectively across those transitions reduces the fatigue and discomfort that accumulates over long rides. The Flexair's breathability performance is its most prominent design characteristic and the standard against which its other attributes should be evaluated.

The stretch mesh finger gussets — the fabric panels between the fingers — are the Flexair's most technically specific construction detail. Finger gussets in a cycling glove serve two simultaneous functions: they allow the glove to conform to the full three-dimensional geometry of the hand across the complete range of grip positions on the handlebar, and they create ventilation channels between the fingers where heat and moisture accumulate most rapidly during sustained effort. Conventional glove construction uses the same primary fabric between the fingers, which restricts movement and traps heat at the interdigital spaces. The Flexair's stretch mesh gussets address both limitations — the mesh's open structure channels air through the glove while the stretch properties allow unrestricted finger movement. The result is a glove that fits and ventilates more effectively at the points where conventional gloves most commonly fail.

The Flexair is described by FOX as a glove that allows riders to 'feel the bars like never before' — a design intent that prioritizes tactile connection to the handlebar over padding-based comfort. The close fit is achieved through the combination of lightweight back-of-hand material, stretch mesh gussets, and the pre-curved finger construction, which positions the fingers in a natural grip geometry without requiring the rider's hand to work against the glove's structure. For mountain bike riding where precise steering input, vibration feedback, and grip adjustment are continuous requirements, the Flexair's bar feel is a meaningful performance characteristic. The glove's minimalist construction means the rider's hand communicates directly with the bar surface rather than through a padded intermediary — a trade-off that prioritizes control and feedback over cushioning.

The Flexair's pre-curved fingers are shaped to match the natural resting position of the hand in a grip — the slight curl of the fingers around a handlebar. A glove with straight finger construction requires the rider's hand to continuously work against the glove's flat geometry to maintain a grip, creating fatigue and pressure points over long efforts. Pre-curved construction eliminates that resistance: the glove's fingers are already positioned in the grip geometry, so the hand maintains its natural position without effort. For mountain bike riding where grip is maintained continuously across technical terrain, the pre-curved construction reduces the cumulative fatigue that straight-fingered gloves produce over long rides.

The Flexair uses a low-profile slip-on neoprene cuff — a closure approach that prioritizes a secure, close fit at the wrist without the bulk, weight, or adjustment complexity of velcro straps, buckles, or extended cuff panels. Neoprene's stretch and recovery properties allow the cuff to conform to the wrist's geometry and maintain consistent compression across the range of wrist positions that mountain bike riding requires. The low-profile design keeps the cuff below the sleeve line of most riding jerseys and jackets, eliminating the gap and bunching that extended cuffs create. The slip-on construction means the glove goes on and comes off quickly — a practical consideration for rides where conditions change and gloves need to be removed or replaced.

The Flexair's Clarino palm material serves two functions simultaneously: it provides the grip surface and durability required for handlebar contact, and it incorporates conductive thread that allows touchscreen operation without removing the glove. Clarino is a synthetic microfiber leather used in cycling and motorsport gloves for its combination of grip, durability, and tactile sensitivity — it provides a consistent grip surface across wet and dry conditions without the stiffness of genuine leather or the slipperiness of smooth synthetics. The touchscreen compatibility is a practical feature for riders who use GPS devices, smartphones, or cycling computers during rides — the ability to interact with a touchscreen without removing a glove is a meaningful convenience on technical terrain where stopping to remove gloves is impractical.

The Flexair provides full-finger coverage — a construction choice that distinguishes it from fingerless cycling gloves and reflects its mountain bike positioning. Full-finger coverage protects the dorsal surface of the fingers from trail debris, branch strikes, and the abrasion of falls that mountain bike riding produces at a frequency that road cycling does not. The Flexair achieves full-finger coverage without the bulk and heat retention that conventional full-finger gloves carry, through the combination of lightweight back-of-hand material and stretch mesh gussets that maintain ventilation across the full finger length. For riders who require finger protection on technical terrain but are unwilling to accept the heat penalty of conventional full-finger construction, the Flexair resolves that trade-off effectively.