X4 MTB Performance Bundle: Short Sleeve Shirt + Short Liners + Jersey

Dominate the trail with the ultimate X4 MTB performance bundle—designed for riders who demand protection, comfort, and style from every angle. The X4 MTB Short Sleeve Shirt delivers G-Form’s re-engineered SmartFlex® technology, pre-curved for ergonomic protection at the shoulders and ribs. Its slim-fit compression mesh base layer keeps you cool and comfortable, while the inner hem gripper ensures a secure fit during every ride.

The X4 MTB Short Liners complement the shirt with targeted SmartFlex® protection, breathable 4-way stretch mesh, dual pockets, a double-layer design for coverage, and an integrated chamois for long-ride comfort. Interior leg grippers keep the shorts in place, no matter how rough the terrain gets.

Top off the setup with the X4 MTB Jersey, made from breathable stretch fabric with UPF 50+ protection. Its modern color-block design and bold X4 graphics deliver style and performance for both on and off the bike, while the lightweight, flexible construction allows unrestricted movement.

Save 10% when you buy all three as a bundle—the complete X4 MTB kit for riders who want unmatched protection, comfort, and trail-ready performance.

Please reference our sizing & fit guides here