IXON Underground Seamless Long-Sleeve Baselayer | Men's Motorcycle Base Layer

When your riding gear fits as it should, your baselayer must keep pace — the IXON Underground seamless long-sleeve baselayer for men is engineered to disappear beneath your kit, eliminating pressure points and chafe so you can concentrate entirely on the ride. Built from a nylon-elastane blend with a seamless construction, it sits flush against the skin under a leather suit, textile jacket or armour-equipped overjacket without adding bulk or bunching.

Key Features

• Seamless construction removes internal seams that cause irritation under tight-fitting protective gear
• Close-fit, body-mapped cut designed for sport and track use — stays in place through aggressive riding positions
• Nylon and elastane blend delivers genuine four-way stretch and unrestricted movement
• Low-profile fit adds virtually no volume beneath a leather suit or race-cut jacket
• Equally at home on trackdays, road sport rides and daily commutes under technical outerwear
• Suitable as the foundational layer beneath any form-fitting motorcycle clothing where comfort and skin-contact quality matter

Seamless Construction: Why It Matters for Motorcycle Use

Traditional base layers carry raised seams across the shoulders, arms and torso — exactly where the inner lining of a motorcycle jacket applies pressure during sustained riding. The IXON Underground eliminates this problem by using a seamless knitting process throughout, giving you an uninterrupted surface against the skin. The result is a base layer that feels genuinely neutral, whether you are tucked in on a racetrack or upright on a motorway cruise.

Beneath a motorcycle jacket or suit, the Underground provides:

• Consistent, crease-free contact with your outer layer's lining
• Reduced friction across the arms and torso during movement
• A comfortable wearing sensation on long-distance sections
• Better everyday wearability under close-fitting protective clothing

Close Fit for Sport, Road and Track

The Underground is cut to a close, athletic fit — not compressive, but body-following enough that it tracks your movement without riding up, twisting or gathering folds around the waist or arms. This makes it particularly valuable for riders in a committed, forward-leaning position, where a looser layer would bunch and create concentrated pressure under the jacket lining.

The sport fit supports you especially during:

• Active, forward riding postures on naked bikes and sportsbikes
• Extended road rides where sustained comfort is a priority
• Trackdays in a leather one-piece or two-piece suit
• Sport road use in a race-cut or close-fitting jacket
• Any gear with a race-fit cut that leaves little room for excess fabric

Flexible, Functional and Ready for Any Ride

The nylon and elastane composition gives the Underground the elastic recovery to move with you naturally, returning to shape after every lean, reach and dismount. There is no stiffness after washing, no loss of stretch through the riding season. Whether you pull on a leather suit for a trackday morning or layer up for a chilly road ride, the Underground adapts to the situation.

On longer stages — or when you mount and dismount frequently in the day — a properly fitting motorcycle base layer makes a measurable difference. The Underground stays close without restricting, making it a practical addition to any technical riding outfit.

Ideal Under Every Form of Protective Gear

The IXON Underground long-sleeve baselayer is designed as the first layer beneath:

• Leather one-piece and two-piece suits
• Motorcycle jackets in textile or leather
• Armoured overjackets and protector vests
• Race suits at circuit and trackday events
• Close-fitting touring or sport outerwear

Whether you ride for sport, commute daily or head to the circuit on weekends, a seamless men's motorcycle base layer that works reliably across the upper body is a straightforward upgrade to your overall comfort setup.

Fitment & Compatibility

The IXON Underground baselayer is intended for use as an under-layer beneath motorcycle protective clothing and is available in sizes XS through 2XL. It is not garment-specific and works with any brand's jacket, suit or armoured clothing where a thin, close-fitting base layer is appropriate.

Specifications