Encore X Specific FeaturesIncluded 1-Wheel Stroller Kit enhances use with a quick transition from biking to strolling out of the boxSuspension keeps kids comfortable by softening bumps and jostles20push button wheels are quick and easy to install and removeHeight adjustable handlebar doubles as an additional roll bar when folded forward while bikingWater-resistant cover and zippers provide added protection in wet conditionsRear window ventilationSunshade protects passengers from harmful UV raysSeat can be detached to convert to cargo trailerHub-engaged parking brake keeps the trailer in place when loading and unloading passengers or cargoAll kit compatibility for stroller, jogger & skiing conversionsStandard Features on Every Burley Child TrailerReady to Bike: includes Steel Hitch, tow bar, and safety flagDesigned and tested to meet or exceed ASTM F1975-09 safety standardsFlex Connector allows bike to lay flat while trailer remains uprightFive-point harness systemFull internal alumin